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Finding the Fourth Proportional to 342,609.12, 513,876.79 and 89,914.97

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Solution

The fourth proportional to 342,609.12, 513,876.79 and 89,914.97 is: 134,862.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    342,609.12 : 513,876.79 = 89,914.97 : x
  2. Step 2: Convert to fraction form
    342,609.12/513,876.79 = 89,914.97/x
  3. Step 3: Cross multiply
    342,609.12x = 513,876.79 × 89,914.97
  4. Step 4: Simplify right side
    342,609.12x = 46,205,216,156.55
  5. Step 5: Solve for x
    x = 46,205,216,156.55/342,609.12
  6. Step 6: Final answer
    x = 134,862.77

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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.