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Finding the Fourth Proportional to 123,443, 170,304.36 and 91,254.90

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Solution

The fourth proportional to 123,443, 170,304.36 and 91,254.90 is: 125,897.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    123,443 : 170,304.36 = 91,254.90 : x
  2. Step 2: Convert to fraction form
    123,443/170,304.36 = 91,254.90/x
  3. Step 3: Cross multiply
    123,443x = 170,304.36 × 91,254.90
  4. Step 4: Simplify right side
    123,443x = 15,541,107,341.36
  5. Step 5: Solve for x
    x = 15,541,107,341.36/123,443
  6. Step 6: Final answer
    x = 125,897.03

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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.