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Finding the Fourth Proportional to 132,081.40, 198,147.70 and 66,417.40

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Solution

The fourth proportional to 132,081.40, 198,147.70 and 66,417.40 is: 99,638.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    132,081.40 : 198,147.70 = 66,417.40 : x
  2. Step 2: Convert to fraction form
    132,081.40/198,147.70 = 66,417.40/x
  3. Step 3: Cross multiply
    132,081.40x = 198,147.70 × 66,417.40
  4. Step 4: Simplify right side
    132,081.40x = 13,160,455,049.98
  5. Step 5: Solve for x
    x = 13,160,455,049.98/132,081.40
  6. Step 6: Final answer
    x = 99,638.97

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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.