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Finding the Fourth Proportional to 120,155.80, 180,233.70 and 57,947.80

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Solution

The fourth proportional to 120,155.80, 180,233.70 and 57,947.80 is: 86,921.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    120,155.80 : 180,233.70 = 57,947.80 : x
  2. Step 2: Convert to fraction form
    120,155.80/180,233.70 = 57,947.80/x
  3. Step 3: Cross multiply
    120,155.80x = 180,233.70 × 57,947.80
  4. Step 4: Simplify right side
    120,155.80x = 10,444,146,400.86
  5. Step 5: Solve for x
    x = 10,444,146,400.86/120,155.80
  6. Step 6: Final answer
    x = 86,921.70

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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.