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Finding the Fourth Proportional to 61,607.64, 85,031.72 and 38,932.20

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Solution

The fourth proportional to 61,607.64, 85,031.72 and 38,932.20 is: 53,734.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    61,607.64 : 85,031.72 = 38,932.20 : x
  2. Step 2: Convert to fraction form
    61,607.64/85,031.72 = 38,932.20/x
  3. Step 3: Cross multiply
    61,607.64x = 85,031.72 × 38,932.20
  4. Step 4: Simplify right side
    61,607.64x = 3,310,471,929.38
  5. Step 5: Solve for x
    x = 3,310,471,929.38/61,607.64
  6. Step 6: Final answer
    x = 53,734.76

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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.