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Finding the Fourth Proportional to 66,503.68, 99,689.28 and 36,934.72

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Solution

The fourth proportional to 66,503.68, 99,689.28 and 36,934.72 is: 55,365.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,503.68 : 99,689.28 = 36,934.72 : x
  2. Step 2: Convert to fraction form
    66,503.68/99,689.28 = 36,934.72/x
  3. Step 3: Cross multiply
    66,503.68x = 99,689.28 × 36,934.72
  4. Step 4: Simplify right side
    66,503.68x = 3,681,995,643.80
  5. Step 5: Solve for x
    x = 3,681,995,643.80/66,503.68
  6. Step 6: Final answer
    x = 55,365.29

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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.