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Finding the Fourth Proportional to 100,863.70, 151,295.55 and 85,117.30

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Solution

The fourth proportional to 100,863.70, 151,295.55 and 85,117.30 is: 127,675.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,863.70 : 151,295.55 = 85,117.30 : x
  2. Step 2: Convert to fraction form
    100,863.70/151,295.55 = 85,117.30/x
  3. Step 3: Cross multiply
    100,863.70x = 151,295.55 × 85,117.30
  4. Step 4: Simplify right side
    100,863.70x = 12,877,868,718.02
  5. Step 5: Solve for x
    x = 12,877,868,718.02/100,863.70
  6. Step 6: Final answer
    x = 127,675.95

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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.