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Finding the Fourth Proportional to 136,328.84, 204,425.34 and 86,370.88

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Solution

The fourth proportional to 136,328.84, 204,425.34 and 86,370.88 is: 129,513.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    136,328.84 : 204,425.34 = 86,370.88 : x
  2. Step 2: Convert to fraction form
    136,328.84/204,425.34 = 86,370.88/x
  3. Step 3: Cross multiply
    136,328.84x = 204,425.34 × 86,370.88
  4. Step 4: Simplify right side
    136,328.84x = 17,656,396,510.10
  5. Step 5: Solve for x
    x = 17,656,396,510.10/136,328.84
  6. Step 6: Final answer
    x = 129,513.29

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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.