Home / 120,395.68-180,427.45-90,780.97

Finding the Fourth Proportional to 120,395.68, 180,427.45 and 90,780.97

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Solution

The fourth proportional to 120,395.68, 180,427.45 and 90,780.97 is: 136,046.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    120,395.68 : 180,427.45 = 90,780.97 : x
  2. Step 2: Convert to fraction form
    120,395.68/180,427.45 = 90,780.97/x
  3. Step 3: Cross multiply
    120,395.68x = 180,427.45 × 90,780.97
  4. Step 4: Simplify right side
    120,395.68x = 16,379,378,925.63
  5. Step 5: Solve for x
    x = 16,379,378,925.63/120,395.68
  6. Step 6: Final answer
    x = 136,046.23

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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.