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Finding the Fourth Proportional to 100,867.80, 151,301.70 and 67,042.20

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Solution

The fourth proportional to 100,867.80, 151,301.70 and 67,042.20 is: 100,563.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,867.80 : 151,301.70 = 67,042.20 : x
  2. Step 2: Convert to fraction form
    100,867.80/151,301.70 = 67,042.20/x
  3. Step 3: Cross multiply
    100,867.80x = 151,301.70 × 67,042.20
  4. Step 4: Simplify right side
    100,867.80x = 10,143,598,831.74
  5. Step 5: Solve for x
    x = 10,143,598,831.74/100,867.80
  6. Step 6: Final answer
    x = 100,563.30

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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.