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Finding the Fourth Proportional to 115,031.73, 158,742.28 and 66,640.25

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Solution

The fourth proportional to 115,031.73, 158,742.28 and 66,640.25 is: 91,962.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    115,031.73 : 158,742.28 = 66,640.25 : x
  2. Step 2: Convert to fraction form
    115,031.73/158,742.28 = 66,640.25/x
  3. Step 3: Cross multiply
    115,031.73x = 158,742.28 × 66,640.25
  4. Step 4: Simplify right side
    115,031.73x = 10,578,625,704.93
  5. Step 5: Solve for x
    x = 10,578,625,704.93/115,031.73
  6. Step 6: Final answer
    x = 91,962.68

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.