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Finding the Fourth Proportional to 123,975.40, 185,963.10 and 71,487.40

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Solution

The fourth proportional to 123,975.40, 185,963.10 and 71,487.40 is: 107,231.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    123,975.40 : 185,963.10 = 71,487.40 : x
  2. Step 2: Convert to fraction form
    123,975.40/185,963.10 = 71,487.40/x
  3. Step 3: Cross multiply
    123,975.40x = 185,963.10 × 71,487.40
  4. Step 4: Simplify right side
    123,975.40x = 13,294,018,514.94
  5. Step 5: Solve for x
    x = 13,294,018,514.94/123,975.40
  6. Step 6: Final answer
    x = 107,231.10

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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.