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Finding the Fourth Proportional to 78,763.97, 118,216.97 and 53,402.13

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Solution

The fourth proportional to 78,763.97, 118,216.97 and 53,402.13 is: 80,151.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,763.97 : 118,216.97 = 53,402.13 : x
  2. Step 2: Convert to fraction form
    78,763.97/118,216.97 = 53,402.13/x
  3. Step 3: Cross multiply
    78,763.97x = 118,216.97 × 53,402.13
  4. Step 4: Simplify right side
    78,763.97x = 6,313,037,733.14
  5. Step 5: Solve for x
    x = 6,313,037,733.14/78,763.97
  6. Step 6: Final answer
    x = 80,151.35

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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.