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Finding the Fourth Proportional to 342,612.57, 513,881.92 and 89,918.39

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Solution

The fourth proportional to 342,612.57, 513,881.92 and 89,918.39 is: 134,867.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    342,612.57 : 513,881.92 = 89,918.39 : x
  2. Step 2: Convert to fraction form
    342,612.57/513,881.92 = 89,918.39/x
  3. Step 3: Cross multiply
    342,612.57x = 513,881.92 × 89,918.39
  4. Step 4: Simplify right side
    342,612.57x = 46,207,434,896.51
  5. Step 5: Solve for x
    x = 46,207,434,896.51/342,612.57
  6. Step 6: Final answer
    x = 134,867.89

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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.