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Finding the Fourth Proportional to 72,463.01, 99,999.50 and 39,757.20

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Solution

The fourth proportional to 72,463.01, 99,999.50 and 39,757.20 is: 54,865.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,463.01 : 99,999.50 = 39,757.20 : x
  2. Step 2: Convert to fraction form
    72,463.01/99,999.50 = 39,757.20/x
  3. Step 3: Cross multiply
    72,463.01x = 99,999.50 × 39,757.20
  4. Step 4: Simplify right side
    72,463.01x = 3,975,700,121.40
  5. Step 5: Solve for x
    x = 3,975,700,121.40/72,463.01
  6. Step 6: Final answer
    x = 54,865.24

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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.