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Finding the Fourth Proportional to 103,724.80, 155,590.40 and 40,542.40

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Solution

The fourth proportional to 103,724.80, 155,590.40 and 40,542.40 is: 60,814.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    103,724.80 : 155,590.40 = 40,542.40 : x
  2. Step 2: Convert to fraction form
    103,724.80/155,590.40 = 40,542.40/x
  3. Step 3: Cross multiply
    103,724.80x = 155,590.40 × 40,542.40
  4. Step 4: Simplify right side
    103,724.80x = 6,308,008,232.96
  5. Step 5: Solve for x
    x = 6,308,008,232.96/103,724.80
  6. Step 6: Final answer
    x = 60,814.85

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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.