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Finding the Fourth Proportional to 77,279.68, 106,646.40 and 45,449.92

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Solution

The fourth proportional to 77,279.68, 106,646.40 and 45,449.92 is: 62,721.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    77,279.68 : 106,646.40 = 45,449.92 : x
  2. Step 2: Convert to fraction form
    77,279.68/106,646.40 = 45,449.92/x
  3. Step 3: Cross multiply
    77,279.68x = 106,646.40 × 45,449.92
  4. Step 4: Simplify right side
    77,279.68x = 4,847,070,348.29
  5. Step 5: Solve for x
    x = 4,847,070,348.29/77,279.68
  6. Step 6: Final answer
    x = 62,721.15

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.