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Finding the Fourth Proportional to 99,866.31, 137,816.55 and 54,545.60

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Solution

The fourth proportional to 99,866.31, 137,816.55 and 54,545.60 is: 75,273.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    99,866.31 : 137,816.55 = 54,545.60 : x
  2. Step 2: Convert to fraction form
    99,866.31/137,816.55 = 54,545.60/x
  3. Step 3: Cross multiply
    99,866.31x = 137,816.55 × 54,545.60
  4. Step 4: Simplify right side
    99,866.31x = 7,517,286,409.68
  5. Step 5: Solve for x
    x = 7,517,286,409.68/99,866.31
  6. Step 6: Final answer
    x = 75,273.50

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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.