Home / 78,114.29-117,121.76-66,272.15

Finding the Fourth Proportional to 78,114.29, 117,121.76 and 66,272.15

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Solution

The fourth proportional to 78,114.29, 117,121.76 and 66,272.15 is: 99,366.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,114.29 : 117,121.76 = 66,272.15 : x
  2. Step 2: Convert to fraction form
    78,114.29/117,121.76 = 66,272.15/x
  3. Step 3: Cross multiply
    78,114.29x = 117,121.76 × 66,272.15
  4. Step 4: Simplify right side
    78,114.29x = 7,761,909,930.01
  5. Step 5: Solve for x
    x = 7,761,909,930.01/78,114.29
  6. Step 6: Final answer
    x = 99,366.08

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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.