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Finding the Fourth Proportional to 103,988.70, 155,691.45 and 101,072.70

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Solution

The fourth proportional to 103,988.70, 155,691.45 and 101,072.70 is: 151,325.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    103,988.70 : 155,691.45 = 101,072.70 : x
  2. Step 2: Convert to fraction form
    103,988.70/155,691.45 = 101,072.70/x
  3. Step 3: Cross multiply
    103,988.70x = 155,691.45 × 101,072.70
  4. Step 4: Simplify right side
    103,988.70x = 15,736,155,218.42
  5. Step 5: Solve for x
    x = 15,736,155,218.42/103,988.70
  6. Step 6: Final answer
    x = 151,325.63

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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.