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Finding the Fourth Proportional to 66,646.79, 91,972.61 and 38,352.47

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Solution

The fourth proportional to 66,646.79, 91,972.61 and 38,352.47 is: 52,926.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,646.79 : 91,972.61 = 38,352.47 : x
  2. Step 2: Convert to fraction form
    66,646.79/91,972.61 = 38,352.47/x
  3. Step 3: Cross multiply
    66,646.79x = 91,972.61 × 38,352.47
  4. Step 4: Simplify right side
    66,646.79x = 3,527,376,114.22
  5. Step 5: Solve for x
    x = 3,527,376,114.22/66,646.79
  6. Step 6: Final answer
    x = 52,926.43

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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.