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Finding the Fourth Proportional to 72,505.72, 100,052.72 and 40,242.08

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Solution

The fourth proportional to 72,505.72, 100,052.72 and 40,242.08 is: 55,531.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,505.72 : 100,052.72 = 40,242.08 : x
  2. Step 2: Convert to fraction form
    72,505.72/100,052.72 = 40,242.08/x
  3. Step 3: Cross multiply
    72,505.72x = 100,052.72 × 40,242.08
  4. Step 4: Simplify right side
    72,505.72x = 4,026,329,562.46
  5. Step 5: Solve for x
    x = 4,026,329,562.46/72,505.72
  6. Step 6: Final answer
    x = 55,531.20

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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.