Home / 99,509.53-137,321.17-54,188.05

Finding the Fourth Proportional to 99,509.53, 137,321.17 and 54,188.05

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Solution

The fourth proportional to 99,509.53, 137,321.17 and 54,188.05 is: 74,778.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    99,509.53 : 137,321.17 = 54,188.05 : x
  2. Step 2: Convert to fraction form
    99,509.53/137,321.17 = 54,188.05/x
  3. Step 3: Cross multiply
    99,509.53x = 137,321.17 × 54,188.05
  4. Step 4: Simplify right side
    99,509.53x = 7,441,166,426.02
  5. Step 5: Solve for x
    x = 7,441,166,426.02/99,509.53
  6. Step 6: Final answer
    x = 74,778.43

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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.