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Finding the Fourth Proportional to 84,424.50, 126,680.49 and 42,871.50

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Solution

The fourth proportional to 84,424.50, 126,680.49 and 42,871.50 is: 64,329.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    84,424.50 : 126,680.49 = 42,871.50 : x
  2. Step 2: Convert to fraction form
    84,424.50/126,680.49 = 42,871.50/x
  3. Step 3: Cross multiply
    84,424.50x = 126,680.49 × 42,871.50
  4. Step 4: Simplify right side
    84,424.50x = 5,430,982,627.04
  5. Step 5: Solve for x
    x = 5,430,982,627.04/84,424.50
  6. Step 6: Final answer
    x = 64,329.46

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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.