Home / 120,931.28-181,491.38-83,751.92

Finding the Fourth Proportional to 120,931.28, 181,491.38 and 83,751.92

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Solution

The fourth proportional to 120,931.28, 181,491.38 and 83,751.92 is: 125,693.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    120,931.28 : 181,491.38 = 83,751.92 : x
  2. Step 2: Convert to fraction form
    120,931.28/181,491.38 = 83,751.92/x
  3. Step 3: Cross multiply
    120,931.28x = 181,491.38 × 83,751.92
  4. Step 4: Simplify right side
    120,931.28x = 15,200,251,538.45
  5. Step 5: Solve for x
    x = 15,200,251,538.45/120,931.28
  6. Step 6: Final answer
    x = 125,693.30

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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.