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Finding the Fourth Proportional to 72,423.86, 108,612.46 and 67,701.11

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Solution

The fourth proportional to 72,423.86, 108,612.46 and 67,701.11 is: 101,529.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,423.86 : 108,612.46 = 67,701.11 : x
  2. Step 2: Convert to fraction form
    72,423.86/108,612.46 = 67,701.11/x
  3. Step 3: Cross multiply
    72,423.86x = 108,612.46 × 67,701.11
  4. Step 4: Simplify right side
    72,423.86x = 7,353,183,389.52
  5. Step 5: Solve for x
    x = 7,353,183,389.52/72,423.86
  6. Step 6: Final answer
    x = 101,529.84

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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.