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Finding the Fourth Proportional to 157,299.91, 217,077.20 and 85,679.76

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Solution

The fourth proportional to 157,299.91, 217,077.20 and 85,679.76 is: 118,239.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    157,299.91 : 217,077.20 = 85,679.76 : x
  2. Step 2: Convert to fraction form
    157,299.91/217,077.20 = 85,679.76/x
  3. Step 3: Cross multiply
    157,299.91x = 217,077.20 × 85,679.76
  4. Step 4: Simplify right side
    157,299.91x = 18,599,121,312.09
  5. Step 5: Solve for x
    x = 18,599,121,312.09/157,299.91
  6. Step 6: Final answer
    x = 118,239.88

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.