Home / 120,778.13-180,353.87-98,635.43

Finding the Fourth Proportional to 120,778.13, 180,353.87 and 98,635.43

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Solution

The fourth proportional to 120,778.13, 180,353.87 and 98,635.43 is: 147,288.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    120,778.13 : 180,353.87 = 98,635.43 : x
  2. Step 2: Convert to fraction form
    120,778.13/180,353.87 = 98,635.43/x
  3. Step 3: Cross multiply
    120,778.13x = 180,353.87 × 98,635.43
  4. Step 4: Simplify right side
    120,778.13x = 17,789,281,519.61
  5. Step 5: Solve for x
    x = 17,789,281,519.61/120,778.13
  6. Step 6: Final answer
    x = 147,288.93

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.