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Finding the Fourth Proportional to 146,909.60, 220,210.80 and 80,247.20

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Solution

The fourth proportional to 146,909.60, 220,210.80 and 80,247.20 is: 120,286.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    146,909.60 : 220,210.80 = 80,247.20 : x
  2. Step 2: Convert to fraction form
    146,909.60/220,210.80 = 80,247.20/x
  3. Step 3: Cross multiply
    146,909.60x = 220,210.80 × 80,247.20
  4. Step 4: Simplify right side
    146,909.60x = 17,671,300,109.76
  5. Step 5: Solve for x
    x = 17,671,300,109.76/146,909.60
  6. Step 6: Final answer
    x = 120,286.90

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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.