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Finding the Fourth Proportional to 66,605.78, 99,957.98 and 31,545.54

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Solution

The fourth proportional to 66,605.78, 99,957.98 and 31,545.54 is: 47,341.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,605.78 : 99,957.98 = 31,545.54 : x
  2. Step 2: Convert to fraction form
    66,605.78/99,957.98 = 31,545.54/x
  3. Step 3: Cross multiply
    66,605.78x = 99,957.98 × 31,545.54
  4. Step 4: Simplify right side
    66,605.78x = 3,153,228,456.41
  5. Step 5: Solve for x
    x = 3,153,228,456.41/66,605.78
  6. Step 6: Final answer
    x = 47,341.66

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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.