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Finding the Fourth Proportional to 66,461.73, 91,665.34 and 42,590.62

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Solution

The fourth proportional to 66,461.73, 91,665.34 and 42,590.62 is: 58,741.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,461.73 : 91,665.34 = 42,590.62 : x
  2. Step 2: Convert to fraction form
    66,461.73/91,665.34 = 42,590.62/x
  3. Step 3: Cross multiply
    66,461.73x = 91,665.34 × 42,590.62
  4. Step 4: Simplify right side
    66,461.73x = 3,904,083,663.11
  5. Step 5: Solve for x
    x = 3,904,083,663.11/66,461.73
  6. Step 6: Final answer
    x = 58,741.83

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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.