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Finding the Fourth Proportional to 72,442.88, 99,975.36 and 54,505.92

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Solution

The fourth proportional to 72,442.88, 99,975.36 and 54,505.92 is: 75,221.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,442.88 : 99,975.36 = 54,505.92 : x
  2. Step 2: Convert to fraction form
    72,442.88/99,975.36 = 54,505.92/x
  3. Step 3: Cross multiply
    72,442.88x = 99,975.36 × 54,505.92
  4. Step 4: Simplify right side
    72,442.88x = 5,449,248,974.13
  5. Step 5: Solve for x
    x = 5,449,248,974.13/72,442.88
  6. Step 6: Final answer
    x = 75,221.32

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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.