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Finding the Fourth Proportional to 217,612.40, 326,159.40 and 91,252.40

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Solution

The fourth proportional to 217,612.40, 326,159.40 and 91,252.40 is: 136,769.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    217,612.40 : 326,159.40 = 91,252.40 : x
  2. Step 2: Convert to fraction form
    217,612.40/326,159.40 = 91,252.40/x
  3. Step 3: Cross multiply
    217,612.40x = 326,159.40 × 91,252.40
  4. Step 4: Simplify right side
    217,612.40x = 29,762,828,032.56
  5. Step 5: Solve for x
    x = 29,762,828,032.56/217,612.40
  6. Step 6: Final answer
    x = 136,769.91

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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.