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Finding the Fourth Proportional to 113,856.70, 170,785.05 and 80,614.30

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Solution

The fourth proportional to 113,856.70, 170,785.05 and 80,614.30 is: 120,921.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    113,856.70 : 170,785.05 = 80,614.30 : x
  2. Step 2: Convert to fraction form
    113,856.70/170,785.05 = 80,614.30/x
  3. Step 3: Cross multiply
    113,856.70x = 170,785.05 × 80,614.30
  4. Step 4: Simplify right side
    113,856.70x = 13,767,717,256.22
  5. Step 5: Solve for x
    x = 13,767,717,256.22/113,856.70
  6. Step 6: Final answer
    x = 120,921.45

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Similar ratio
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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.