Home / 78,314,999.20-117,472,498.80-66,725,648.80

Finding the Fourth Proportional to 78,314,999.20, 117,472,498.80 and 66,725,648.80

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Solution

The fourth proportional to 78,314,999.20, 117,472,498.80 and 66,725,648.80 is: 100,088,473.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,314,999.20 : 117,472,498.80 = 66,725,648.80 : x
  2. Step 2: Convert to fraction form
    78,314,999.20/117,472,498.80 = 66,725,648.80/x
  3. Step 3: Cross multiply
    78,314,999.20x = 117,472,498.80 × 66,725,648.80
  4. Step 4: Simplify right side
    78,314,999.20x = 7,838,428,698,587,221
  5. Step 5: Solve for x
    x = 7,838,428,698,587,221/78,314,999.20
  6. Step 6: Final answer
    x = 100,088,473.20

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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.