Home / 131,818.98-181,909.20-71,388.21

Finding the Fourth Proportional to 131,818.98, 181,909.20 and 71,388.21

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Solution

The fourth proportional to 131,818.98, 181,909.20 and 71,388.21 is: 98,515.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    131,818.98 : 181,909.20 = 71,388.21 : x
  2. Step 2: Convert to fraction form
    131,818.98/181,909.20 = 71,388.21/x
  3. Step 3: Cross multiply
    131,818.98x = 181,909.20 × 71,388.21
  4. Step 4: Simplify right side
    131,818.98x = 12,986,172,170.53
  5. Step 5: Solve for x
    x = 12,986,172,170.53/131,818.98
  6. Step 6: Final answer
    x = 98,515.19

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.