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Finding the Fourth Proportional to 140,657.85, 210,986.77 and 42,161.85

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Solution

The fourth proportional to 140,657.85, 210,986.77 and 42,161.85 is: 63,242.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    140,657.85 : 210,986.77 = 42,161.85 : x
  2. Step 2: Convert to fraction form
    140,657.85/210,986.77 = 42,161.85/x
  3. Step 3: Cross multiply
    140,657.85x = 210,986.77 × 42,161.85
  4. Step 4: Simplify right side
    140,657.85x = 8,895,591,282.98
  5. Step 5: Solve for x
    x = 8,895,591,282.98/140,657.85
  6. Step 6: Final answer
    x = 63,242.77

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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.