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Finding the Fourth Proportional to 61,761.32, 92,651.20 and 19,642.78

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Solution

The fourth proportional to 61,761.32, 92,651.20 and 19,642.78 is: 29,467.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    61,761.32 : 92,651.20 = 19,642.78 : x
  2. Step 2: Convert to fraction form
    61,761.32/92,651.20 = 19,642.78/x
  3. Step 3: Cross multiply
    61,761.32x = 92,651.20 × 19,642.78
  4. Step 4: Simplify right side
    61,761.32x = 1,819,927,020.42
  5. Step 5: Solve for x
    x = 1,819,927,020.42/61,761.32
  6. Step 6: Final answer
    x = 29,467.10

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.