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Finding the Fourth Proportional to 100,865.80, 151,298.70 and 67,040.20

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Solution

The fourth proportional to 100,865.80, 151,298.70 and 67,040.20 is: 100,560.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,865.80 : 151,298.70 = 67,040.20 : x
  2. Step 2: Convert to fraction form
    100,865.80/151,298.70 = 67,040.20/x
  3. Step 3: Cross multiply
    100,865.80x = 151,298.70 × 67,040.20
  4. Step 4: Simplify right side
    100,865.80x = 10,143,095,107.74
  5. Step 5: Solve for x
    x = 10,143,095,107.74/100,865.80
  6. Step 6: Final answer
    x = 100,560.30

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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.