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Finding the Fourth Proportional to 99,617.50, 137,472.20 and 54,295.53

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Solution

The fourth proportional to 99,617.50, 137,472.20 and 54,295.53 is: 74,927.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    99,617.50 : 137,472.20 = 54,295.53 : x
  2. Step 2: Convert to fraction form
    99,617.50/137,472.20 = 54,295.53/x
  3. Step 3: Cross multiply
    99,617.50x = 137,472.20 × 54,295.53
  4. Step 4: Simplify right side
    99,617.50x = 7,464,125,959.27
  5. Step 5: Solve for x
    x = 7,464,125,959.27/99,617.50
  6. Step 6: Final answer
    x = 74,927.86

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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.