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Finding the Fourth Proportional to 126,156.60, 189,234.90 and 121,318.20

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Solution

The fourth proportional to 126,156.60, 189,234.90 and 121,318.20 is: 181,977.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    126,156.60 : 189,234.90 = 121,318.20 : x
  2. Step 2: Convert to fraction form
    126,156.60/189,234.90 = 121,318.20/x
  3. Step 3: Cross multiply
    126,156.60x = 189,234.90 × 121,318.20
  4. Step 4: Simplify right side
    126,156.60x = 22,957,637,445.18
  5. Step 5: Solve for x
    x = 22,957,637,445.18/126,156.60
  6. Step 6: Final answer
    x = 181,977.30

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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.