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Finding the Fourth Proportional to 66,553.78, 99,854.43 and 28,587.10

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Solution

The fourth proportional to 66,553.78, 99,854.43 and 28,587.10 is: 42,890.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,553.78 : 99,854.43 = 28,587.10 : x
  2. Step 2: Convert to fraction form
    66,553.78/99,854.43 = 28,587.10/x
  3. Step 3: Cross multiply
    66,553.78x = 99,854.43 × 28,587.10
  4. Step 4: Simplify right side
    66,553.78x = 2,854,548,575.85
  5. Step 5: Solve for x
    x = 2,854,548,575.85/66,553.78
  6. Step 6: Final answer
    x = 42,890.86

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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.