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Finding the Fourth Proportional to 66,547.80, 91,836.86 and 36,332.78

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Solution

The fourth proportional to 66,547.80, 91,836.86 and 36,332.78 is: 50,139.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,547.80 : 91,836.86 = 36,332.78 : x
  2. Step 2: Convert to fraction form
    66,547.80/91,836.86 = 36,332.78/x
  3. Step 3: Cross multiply
    66,547.80x = 91,836.86 × 36,332.78
  4. Step 4: Simplify right side
    66,547.80x = 3,336,687,789.42
  5. Step 5: Solve for x
    x = 3,336,687,789.42/66,547.80
  6. Step 6: Final answer
    x = 50,139.72

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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.