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Finding the Fourth Proportional to 342,615.57, 513,886.42 and 89,921.39

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Solution

The fourth proportional to 342,615.57, 513,886.42 and 89,921.39 is: 134,872.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    342,615.57 : 513,886.42 = 89,921.39 : x
  2. Step 2: Convert to fraction form
    342,615.57/513,886.42 = 89,921.39/x
  3. Step 3: Cross multiply
    342,615.57x = 513,886.42 × 89,921.39
  4. Step 4: Simplify right side
    342,615.57x = 46,209,381,188.52
  5. Step 5: Solve for x
    x = 46,209,381,188.52/342,615.57
  6. Step 6: Final answer
    x = 134,872.39

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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.