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Finding the Fourth Proportional to 140,159.20, 210,238.80 and 80,964.40

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Solution

The fourth proportional to 140,159.20, 210,238.80 and 80,964.40 is: 121,446.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    140,159.20 : 210,238.80 = 80,964.40 : x
  2. Step 2: Convert to fraction form
    140,159.20/210,238.80 = 80,964.40/x
  3. Step 3: Cross multiply
    140,159.20x = 210,238.80 × 80,964.40
  4. Step 4: Simplify right side
    140,159.20x = 17,021,858,298.72
  5. Step 5: Solve for x
    x = 17,021,858,298.72/140,159.20
  6. Step 6: Final answer
    x = 121,446.60

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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.