Home / 126,337.60-189,256.80-81,995.20

Finding the Fourth Proportional to 126,337.60, 189,256.80 and 81,995.20

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Solution

The fourth proportional to 126,337.60, 189,256.80 and 81,995.20 is: 122,830.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    126,337.60 : 189,256.80 = 81,995.20 : x
  2. Step 2: Convert to fraction form
    126,337.60/189,256.80 = 81,995.20/x
  3. Step 3: Cross multiply
    126,337.60x = 189,256.80 × 81,995.20
  4. Step 4: Simplify right side
    126,337.60x = 15,518,149,167.36
  5. Step 5: Solve for x
    x = 15,518,149,167.36/126,337.60
  6. Step 6: Final answer
    x = 122,830.81

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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.