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Finding the Fourth Proportional to 129,462.49, 178,351.93 and 123,483.47

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Solution

The fourth proportional to 129,462.49, 178,351.93 and 123,483.47 is: 170,115.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    129,462.49 : 178,351.93 = 123,483.47 : x
  2. Step 2: Convert to fraction form
    129,462.49/178,351.93 = 123,483.47/x
  3. Step 3: Cross multiply
    129,462.49x = 178,351.93 × 123,483.47
  4. Step 4: Simplify right side
    129,462.49x = 22,023,515,197.60
  5. Step 5: Solve for x
    x = 22,023,515,197.60/129,462.49
  6. Step 6: Final answer
    x = 170,115.03

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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.