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Finding the Fourth Proportional to 83,645.80, 125,468.70 and 77,165.80

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Solution

The fourth proportional to 83,645.80, 125,468.70 and 77,165.80 is: 115,748.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    83,645.80 : 125,468.70 = 77,165.80 : x
  2. Step 2: Convert to fraction form
    83,645.80/125,468.70 = 77,165.80/x
  3. Step 3: Cross multiply
    83,645.80x = 125,468.70 × 77,165.80
  4. Step 4: Simplify right side
    83,645.80x = 9,681,892,610.46
  5. Step 5: Solve for x
    x = 9,681,892,610.46/83,645.80
  6. Step 6: Final answer
    x = 115,748.70

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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.