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Finding the Fourth Proportional to 140,543.85, 210,477.97 and 80,389.97

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Solution

The fourth proportional to 140,543.85, 210,477.97 and 80,389.97 is: 120,391.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    140,543.85 : 210,477.97 = 80,389.97 : x
  2. Step 2: Convert to fraction form
    140,543.85/210,477.97 = 80,389.97/x
  3. Step 3: Cross multiply
    140,543.85x = 210,477.97 × 80,389.97
  4. Step 4: Simplify right side
    140,543.85x = 16,920,317,693.96
  5. Step 5: Solve for x
    x = 16,920,317,693.96/140,543.85
  6. Step 6: Final answer
    x = 120,391.73

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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.