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Finding the Fourth Proportional to 99,472.50, 137,272.32 and 54,760.50

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Solution

The fourth proportional to 99,472.50, 137,272.32 and 54,760.50 is: 75,569.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    99,472.50 : 137,272.32 = 54,760.50 : x
  2. Step 2: Convert to fraction form
    99,472.50/137,272.32 = 54,760.50/x
  3. Step 3: Cross multiply
    99,472.50x = 137,272.32 × 54,760.50
  4. Step 4: Simplify right side
    99,472.50x = 7,517,100,879.36
  5. Step 5: Solve for x
    x = 7,517,100,879.36/99,472.50
  6. Step 6: Final answer
    x = 75,569.64

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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.