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Finding the Fourth Proportional to 71,953.92, 99,295.96 and 40,123.20

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Solution

The fourth proportional to 71,953.92, 99,295.96 and 40,123.20 is: 55,369.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    71,953.92 : 99,295.96 = 40,123.20 : x
  2. Step 2: Convert to fraction form
    71,953.92/99,295.96 = 40,123.20/x
  3. Step 3: Cross multiply
    71,953.92x = 99,295.96 × 40,123.20
  4. Step 4: Simplify right side
    71,953.92x = 3,984,071,662.27
  5. Step 5: Solve for x
    x = 3,984,071,662.27/71,953.92
  6. Step 6: Final answer
    x = 55,369.77

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.