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Finding the Fourth Proportional to 72,232.48, 99,678.90 and 40,404.88

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Solution

The fourth proportional to 72,232.48, 99,678.90 and 40,404.88 is: 55,757.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,232.48 : 99,678.90 = 40,404.88 : x
  2. Step 2: Convert to fraction form
    72,232.48/99,678.90 = 40,404.88/x
  3. Step 3: Cross multiply
    72,232.48x = 99,678.90 × 40,404.88
  4. Step 4: Simplify right side
    72,232.48x = 4,027,513,993.03
  5. Step 5: Solve for x
    x = 4,027,513,993.03/72,232.48
  6. Step 6: Final answer
    x = 55,757.66

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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.