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Finding the Fourth Proportional to 72,344.40, 108,379.44 and 42,673.92

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Solution

The fourth proportional to 72,344.40, 108,379.44 and 42,673.92 is: 63,929.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,344.40 : 108,379.44 = 42,673.92 : x
  2. Step 2: Convert to fraction form
    72,344.40/108,379.44 = 42,673.92/x
  3. Step 3: Cross multiply
    72,344.40x = 108,379.44 × 42,673.92
  4. Step 4: Simplify right side
    72,344.40x = 4,624,975,552.20
  5. Step 5: Solve for x
    x = 4,624,975,552.20/72,344.40
  6. Step 6: Final answer
    x = 63,929.97

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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.