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Finding the Fourth Proportional to 158,271.70, 218,744.13 and 126,778.90

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Solution

The fourth proportional to 158,271.70, 218,744.13 and 126,778.90 is: 175,218.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    158,271.70 : 218,744.13 = 126,778.90 : x
  2. Step 2: Convert to fraction form
    158,271.70/218,744.13 = 126,778.90/x
  3. Step 3: Cross multiply
    158,271.70x = 218,744.13 × 126,778.90
  4. Step 4: Simplify right side
    158,271.70x = 27,732,140,182.86
  5. Step 5: Solve for x
    x = 27,732,140,182.86/158,271.70
  6. Step 6: Final answer
    x = 175,218.57

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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.