Home / 78,217.11-117,255.47-28,285.47

Finding the Fourth Proportional to 78,217.11, 117,255.47 and 28,285.47

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Solution

The fourth proportional to 78,217.11, 117,255.47 and 28,285.47 is: 42,402.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,217.11 : 117,255.47 = 28,285.47 : x
  2. Step 2: Convert to fraction form
    78,217.11/117,255.47 = 28,285.47/x
  3. Step 3: Cross multiply
    78,217.11x = 117,255.47 × 28,285.47
  4. Step 4: Simplify right side
    78,217.11x = 3,316,625,937.59
  5. Step 5: Solve for x
    x = 3,316,625,937.59/78,217.11
  6. Step 6: Final answer
    x = 42,402.82

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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.