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Finding the Fourth Proportional to 124,494.80, 186,304.80 and 85,128.80

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Solution

The fourth proportional to 124,494.80, 186,304.80 and 85,128.80 is: 127,394.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    124,494.80 : 186,304.80 = 85,128.80 : x
  2. Step 2: Convert to fraction form
    124,494.80/186,304.80 = 85,128.80/x
  3. Step 3: Cross multiply
    124,494.80x = 186,304.80 × 85,128.80
  4. Step 4: Simplify right side
    124,494.80x = 15,859,904,058.24
  5. Step 5: Solve for x
    x = 15,859,904,058.24/124,494.80
  6. Step 6: Final answer
    x = 127,394.11

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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.