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Finding the Fourth Proportional to 157,421.88, 217,240.92 and 85,800.60

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Solution

The fourth proportional to 157,421.88, 217,240.92 and 85,800.60 is: 118,404.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    157,421.88 : 217,240.92 = 85,800.60 : x
  2. Step 2: Convert to fraction form
    157,421.88/217,240.92 = 85,800.60/x
  3. Step 3: Cross multiply
    157,421.88x = 217,240.92 × 85,800.60
  4. Step 4: Simplify right side
    157,421.88x = 18,639,401,280.55
  5. Step 5: Solve for x
    x = 18,639,401,280.55/157,421.88
  6. Step 6: Final answer
    x = 118,404.13

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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.