Home / 78,732,085.80-118,098,128.70-21,230,169.60

Finding the Fourth Proportional to 78,732,085.80, 118,098,128.70 and 21,230,169.60

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Solution

The fourth proportional to 78,732,085.80, 118,098,128.70 and 21,230,169.60 is: 31,845,254.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,732,085.80 : 118,098,128.70 = 21,230,169.60 : x
  2. Step 2: Convert to fraction form
    78,732,085.80/118,098,128.70 = 21,230,169.60/x
  3. Step 3: Cross multiply
    78,732,085.80x = 118,098,128.70 × 21,230,169.60
  4. Step 4: Simplify right side
    78,732,085.80x = 2,507,243,301,743,628
  5. Step 5: Solve for x
    x = 2,507,243,301,743,628/78,732,085.80
  6. Step 6: Final answer
    x = 31,845,254.40

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Similar ratio
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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.