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Finding the Fourth Proportional to 136,066.68, 204,063.12 and 86,071.68

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Solution

The fourth proportional to 136,066.68, 204,063.12 and 86,071.68 is: 129,084.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    136,066.68 : 204,063.12 = 86,071.68 : x
  2. Step 2: Convert to fraction form
    136,066.68/204,063.12 = 86,071.68/x
  3. Step 3: Cross multiply
    136,066.68x = 204,063.12 × 86,071.68
  4. Step 4: Simplify right side
    136,066.68x = 17,564,055,564.44
  5. Step 5: Solve for x
    x = 17,564,055,564.44/136,066.68
  6. Step 6: Final answer
    x = 129,084.18

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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.