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Finding the Fourth Proportional to 242,391.81, 363,753.78 and 84,620.25

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Solution

The fourth proportional to 242,391.81, 363,753.78 and 84,620.25 is: 126,988.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    242,391.81 : 363,753.78 = 84,620.25 : x
  2. Step 2: Convert to fraction form
    242,391.81/363,753.78 = 84,620.25/x
  3. Step 3: Cross multiply
    242,391.81x = 363,753.78 × 84,620.25
  4. Step 4: Simplify right side
    242,391.81x = 30,780,937,483.45
  5. Step 5: Solve for x
    x = 30,780,937,483.45/242,391.81
  6. Step 6: Final answer
    x = 126,988.36

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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.