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Finding the Fourth Proportional to 157,520.40, 217,380.04 and 85,899.80

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Solution

The fourth proportional to 157,520.40, 217,380.04 and 85,899.80 is: 118,542.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    157,520.40 : 217,380.04 = 85,899.80 : x
  2. Step 2: Convert to fraction form
    157,520.40/217,380.04 = 85,899.80/x
  3. Step 3: Cross multiply
    157,520.40x = 217,380.04 × 85,899.80
  4. Step 4: Simplify right side
    157,520.40x = 18,672,901,959.99
  5. Step 5: Solve for x
    x = 18,672,901,959.99/157,520.40
  6. Step 6: Final answer
    x = 118,542.75

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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.