Home / 120,581.20-180,828.60-61,397.20

Finding the Fourth Proportional to 120,581.20, 180,828.60 and 61,397.20

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Solution

The fourth proportional to 120,581.20, 180,828.60 and 61,397.20 is: 92,073.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    120,581.20 : 180,828.60 = 61,397.20 : x
  2. Step 2: Convert to fraction form
    120,581.20/180,828.60 = 61,397.20/x
  3. Step 3: Cross multiply
    120,581.20x = 180,828.60 × 61,397.20
  4. Step 4: Simplify right side
    120,581.20x = 11,102,369,719.92
  5. Step 5: Solve for x
    x = 11,102,369,719.92/120,581.20
  6. Step 6: Final answer
    x = 92,073.80

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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.