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Finding the Fourth Proportional to 140,238.90, 210,191.04 and 80,949.30

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Solution

The fourth proportional to 140,238.90, 210,191.04 and 80,949.30 is: 121,327.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    140,238.90 : 210,191.04 = 80,949.30 : x
  2. Step 2: Convert to fraction form
    140,238.90/210,191.04 = 80,949.30/x
  3. Step 3: Cross multiply
    140,238.90x = 210,191.04 × 80,949.30
  4. Step 4: Simplify right side
    140,238.90x = 17,014,817,554.27
  5. Step 5: Solve for x
    x = 17,014,817,554.27/140,238.90
  6. Step 6: Final answer
    x = 121,327.37

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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.