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Finding the Fourth Proportional to 125,947.30, 189,139.65 and 66,898.30

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Solution

The fourth proportional to 125,947.30, 189,139.65 and 66,898.30 is: 100,463.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    125,947.30 : 189,139.65 = 66,898.30 : x
  2. Step 2: Convert to fraction form
    125,947.30/189,139.65 = 66,898.30/x
  3. Step 3: Cross multiply
    125,947.30x = 189,139.65 × 66,898.30
  4. Step 4: Simplify right side
    125,947.30x = 12,653,121,047.60
  5. Step 5: Solve for x
    x = 12,653,121,047.60/125,947.30
  6. Step 6: Final answer
    x = 100,463.61

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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.