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Finding the Fourth Proportional to 66,565.11, 91,871.71 and 39,340.08

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Solution

The fourth proportional to 66,565.11, 91,871.71 and 39,340.08 is: 54,296.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,565.11 : 91,871.71 = 39,340.08 : x
  2. Step 2: Convert to fraction form
    66,565.11/91,871.71 = 39,340.08/x
  3. Step 3: Cross multiply
    66,565.11x = 91,871.71 × 39,340.08
  4. Step 4: Simplify right side
    66,565.11x = 3,614,240,191.46
  5. Step 5: Solve for x
    x = 3,614,240,191.46/66,565.11
  6. Step 6: Final answer
    x = 54,296.32

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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.