Home / 78,579.40-117,828.32-38,580.80

Finding the Fourth Proportional to 78,579.40, 117,828.32 and 38,580.80

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Solution

The fourth proportional to 78,579.40, 117,828.32 and 38,580.80 is: 57,851.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,579.40 : 117,828.32 = 38,580.80 : x
  2. Step 2: Convert to fraction form
    78,579.40/117,828.32 = 38,580.80/x
  3. Step 3: Cross multiply
    78,579.40x = 117,828.32 × 38,580.80
  4. Step 4: Simplify right side
    78,579.40x = 4,545,910,848.26
  5. Step 5: Solve for x
    x = 4,545,910,848.26/78,579.40
  6. Step 6: Final answer
    x = 57,851.18

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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.