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Finding the Fourth Proportional to 361,663.80, 542,495.70 and 99,007.80

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Solution

The fourth proportional to 361,663.80, 542,495.70 and 99,007.80 is: 148,511.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    361,663.80 : 542,495.70 = 99,007.80 : x
  2. Step 2: Convert to fraction form
    361,663.80/542,495.70 = 99,007.80/x
  3. Step 3: Cross multiply
    361,663.80x = 542,495.70 × 99,007.80
  4. Step 4: Simplify right side
    361,663.80x = 53,711,305,766.46
  5. Step 5: Solve for x
    x = 53,711,305,766.46/361,663.80
  6. Step 6: Final answer
    x = 148,511.70

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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.