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Finding the Fourth Proportional to 120,209.95, 180,155.65 and 63,928.88

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Solution

The fourth proportional to 120,209.95, 180,155.65 and 63,928.88 is: 95,808.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    120,209.95 : 180,155.65 = 63,928.88 : x
  2. Step 2: Convert to fraction form
    120,209.95/180,155.65 = 63,928.88/x
  3. Step 3: Cross multiply
    120,209.95x = 180,155.65 × 63,928.88
  4. Step 4: Simplify right side
    120,209.95x = 11,517,148,930.17
  5. Step 5: Solve for x
    x = 11,517,148,930.17/120,209.95
  6. Step 6: Final answer
    x = 95,808.62

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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.