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Finding the Fourth Proportional to 61,486.72, 92,239.77 and 21,516.86

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Solution

The fourth proportional to 61,486.72, 92,239.77 and 21,516.86 is: 32,278.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    61,486.72 : 92,239.77 = 21,516.86 : x
  2. Step 2: Convert to fraction form
    61,486.72/92,239.77 = 21,516.86/x
  3. Step 3: Cross multiply
    61,486.72x = 92,239.77 × 21,516.86
  4. Step 4: Simplify right side
    61,486.72x = 1,984,710,217.52
  5. Step 5: Solve for x
    x = 1,984,710,217.52/61,486.72
  6. Step 6: Final answer
    x = 32,278.68

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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.