Home / 146,909.20-220,631.10-128,538.40

Finding the Fourth Proportional to 146,909.20, 220,631.10 and 128,538.40

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Solution

The fourth proportional to 146,909.20, 220,631.10 and 128,538.40 is: 193,041.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    146,909.20 : 220,631.10 = 128,538.40 : x
  2. Step 2: Convert to fraction form
    146,909.20/220,631.10 = 128,538.40/x
  3. Step 3: Cross multiply
    146,909.20x = 220,631.10 × 128,538.40
  4. Step 4: Simplify right side
    146,909.20x = 28,359,568,584.24
  5. Step 5: Solve for x
    x = 28,359,568,584.24/146,909.20
  6. Step 6: Final answer
    x = 193,041.47

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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.