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Finding the Fourth Proportional to 131,514, 181,492.20 and 71,898

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Solution

The fourth proportional to 131,514, 181,492.20 and 71,898 is: 99,220.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    131,514 : 181,492.20 = 71,898 : x
  2. Step 2: Convert to fraction form
    131,514/181,492.20 = 71,898/x
  3. Step 3: Cross multiply
    131,514x = 181,492.20 × 71,898
  4. Step 4: Simplify right side
    131,514x = 13,048,926,195.60
  5. Step 5: Solve for x
    x = 13,048,926,195.60/131,514
  6. Step 6: Final answer
    x = 99,220.81

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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.