Home / 120,421.16-180,640.02-36,177.80

Finding the Fourth Proportional to 120,421.16, 180,640.02 and 36,177.80

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Solution

The fourth proportional to 120,421.16, 180,640.02 and 36,177.80 is: 54,269.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    120,421.16 : 180,640.02 = 36,177.80 : x
  2. Step 2: Convert to fraction form
    120,421.16/180,640.02 = 36,177.80/x
  3. Step 3: Cross multiply
    120,421.16x = 180,640.02 × 36,177.80
  4. Step 4: Simplify right side
    120,421.16x = 6,535,158,515.56
  5. Step 5: Solve for x
    x = 6,535,158,515.56/120,421.16
  6. Step 6: Final answer
    x = 54,269.19

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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.