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Finding the Fourth Proportional to 131,876.70, 181,989.59 and 71,448.85

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Solution

The fourth proportional to 131,876.70, 181,989.59 and 71,448.85 is: 98,599.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    131,876.70 : 181,989.59 = 71,448.85 : x
  2. Step 2: Convert to fraction form
    131,876.70/181,989.59 = 71,448.85/x
  3. Step 3: Cross multiply
    131,876.70x = 181,989.59 × 71,448.85
  4. Step 4: Simplify right side
    131,876.70x = 13,002,946,917.47
  5. Step 5: Solve for x
    x = 13,002,946,917.47/131,876.70
  6. Step 6: Final answer
    x = 98,599.27

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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.