Home / 78,115.29-117,123.25-66,273.15

Finding the Fourth Proportional to 78,115.29, 117,123.25 and 66,273.15

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Solution

The fourth proportional to 78,115.29, 117,123.25 and 66,273.15 is: 99,367.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,115.29 : 117,123.25 = 66,273.15 : x
  2. Step 2: Convert to fraction form
    78,115.29/117,123.25 = 66,273.15/x
  3. Step 3: Cross multiply
    78,115.29x = 117,123.25 × 66,273.15
  4. Step 4: Simplify right side
    78,115.29x = 7,762,126,715.74
  5. Step 5: Solve for x
    x = 7,762,126,715.74/78,115.29
  6. Step 6: Final answer
    x = 99,367.57

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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.