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Finding the Fourth Proportional to 105,053.88, 145,132.45 and 68,841.38

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Solution

The fourth proportional to 105,053.88, 145,132.45 and 68,841.38 is: 95,104.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    105,053.88 : 145,132.45 = 68,841.38 : x
  2. Step 2: Convert to fraction form
    105,053.88/145,132.45 = 68,841.38/x
  3. Step 3: Cross multiply
    105,053.88x = 145,132.45 × 68,841.38
  4. Step 4: Simplify right side
    105,053.88x = 9,991,118,140.78
  5. Step 5: Solve for x
    x = 9,991,118,140.78/105,053.88
  6. Step 6: Final answer
    x = 95,104.70

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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.