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Finding the Fourth Proportional to 140,228.80, 209,905.80 and 100,862.80

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Solution

The fourth proportional to 140,228.80, 209,905.80 and 100,862.80 is: 150,979.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    140,228.80 : 209,905.80 = 100,862.80 : x
  2. Step 2: Convert to fraction form
    140,228.80/209,905.80 = 100,862.80/x
  3. Step 3: Cross multiply
    140,228.80x = 209,905.80 × 100,862.80
  4. Step 4: Simplify right side
    140,228.80x = 21,171,686,724.24
  5. Step 5: Solve for x
    x = 21,171,686,724.24/140,228.80
  6. Step 6: Final answer
    x = 150,979.59

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1.5x scale

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.