Home / 126,602.70-189,904.05-81,987.90

Finding the Fourth Proportional to 126,602.70, 189,904.05 and 81,987.90

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Solution

The fourth proportional to 126,602.70, 189,904.05 and 81,987.90 is: 122,981.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    126,602.70 : 189,904.05 = 81,987.90 : x
  2. Step 2: Convert to fraction form
    126,602.70/189,904.05 = 81,987.90/x
  3. Step 3: Cross multiply
    126,602.70x = 189,904.05 × 81,987.90
  4. Step 4: Simplify right side
    126,602.70x = 15,569,834,261.00
  5. Step 5: Solve for x
    x = 15,569,834,261.00/126,602.70
  6. Step 6: Final answer
    x = 122,981.85

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Similar ratio
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1.5x scale

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.