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Finding the Fourth Proportional to 140,108.60, 209,932.05 and 80,840.90

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Solution

The fourth proportional to 140,108.60, 209,932.05 and 80,840.90 is: 121,128.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    140,108.60 : 209,932.05 = 80,840.90 : x
  2. Step 2: Convert to fraction form
    140,108.60/209,932.05 = 80,840.90/x
  3. Step 3: Cross multiply
    140,108.60x = 209,932.05 × 80,840.90
  4. Step 4: Simplify right side
    140,108.60x = 16,971,095,860.85
  5. Step 5: Solve for x
    x = 16,971,095,860.85/140,108.60
  6. Step 6: Final answer
    x = 121,128.15

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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.