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Finding the Fourth Proportional to 120,347.20, 180,520.80 and 84,917.80

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Solution

The fourth proportional to 120,347.20, 180,520.80 and 84,917.80 is: 127,376.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    120,347.20 : 180,520.80 = 84,917.80 : x
  2. Step 2: Convert to fraction form
    120,347.20/180,520.80 = 84,917.80/x
  3. Step 3: Cross multiply
    120,347.20x = 180,520.80 × 84,917.80
  4. Step 4: Simplify right side
    120,347.20x = 15,329,429,190.24
  5. Step 5: Solve for x
    x = 15,329,429,190.24/120,347.20
  6. Step 6: Final answer
    x = 127,376.70

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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.