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Finding the Fourth Proportional to 61,606.61, 85,030.38 and 38,931.20

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Solution

The fourth proportional to 61,606.61, 85,030.38 and 38,931.20 is: 53,733.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    61,606.61 : 85,030.38 = 38,931.20 : x
  2. Step 2: Convert to fraction form
    61,606.61/85,030.38 = 38,931.20/x
  3. Step 3: Cross multiply
    61,606.61x = 85,030.38 × 38,931.20
  4. Step 4: Simplify right side
    61,606.61x = 3,310,334,304.70
  5. Step 5: Solve for x
    x = 3,310,334,304.70/61,606.61
  6. Step 6: Final answer
    x = 53,733.43

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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.