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Finding the Fourth Proportional to 157,354.55, 217,151.76 and 85,734.54

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Solution

The fourth proportional to 157,354.55, 217,151.76 and 85,734.54 is: 118,315.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    157,354.55 : 217,151.76 = 85,734.54 : x
  2. Step 2: Convert to fraction form
    157,354.55/217,151.76 = 85,734.54/x
  3. Step 3: Cross multiply
    157,354.55x = 217,151.76 × 85,734.54
  4. Step 4: Simplify right side
    157,354.55x = 18,617,406,253.79
  5. Step 5: Solve for x
    x = 18,617,406,253.79/157,354.55
  6. Step 6: Final answer
    x = 118,315.02

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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.