Home / 126,084.40-189,005.10-72,721.60

Finding the Fourth Proportional to 126,084.40, 189,005.10 and 72,721.60

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Solution

The fourth proportional to 126,084.40, 189,005.10 and 72,721.60 is: 109,012.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    126,084.40 : 189,005.10 = 72,721.60 : x
  2. Step 2: Convert to fraction form
    126,084.40/189,005.10 = 72,721.60/x
  3. Step 3: Cross multiply
    126,084.40x = 189,005.10 × 72,721.60
  4. Step 4: Simplify right side
    126,084.40x = 13,744,753,280.16
  5. Step 5: Solve for x
    x = 13,744,753,280.16/126,084.40
  6. Step 6: Final answer
    x = 109,012.32

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.