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Finding the Fourth Proportional to 131,416.88, 181,355.29 and 71,800.88

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Solution

The fourth proportional to 131,416.88, 181,355.29 and 71,800.88 is: 99,085.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    131,416.88 : 181,355.29 = 71,800.88 : x
  2. Step 2: Convert to fraction form
    131,416.88/181,355.29 = 71,800.88/x
  3. Step 3: Cross multiply
    131,416.88x = 181,355.29 × 71,800.88
  4. Step 4: Simplify right side
    131,416.88x = 13,021,469,414.66
  5. Step 5: Solve for x
    x = 13,021,469,414.66/131,416.88
  6. Step 6: Final answer
    x = 99,085.21

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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.