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Finding the Fourth Proportional to 131,658.01, 181,687.56 and 71,228.46

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Solution

The fourth proportional to 131,658.01, 181,687.56 and 71,228.46 is: 98,295.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    131,658.01 : 181,687.56 = 71,228.46 : x
  2. Step 2: Convert to fraction form
    131,658.01/181,687.56 = 71,228.46/x
  3. Step 3: Cross multiply
    131,658.01x = 181,687.56 × 71,228.46
  4. Step 4: Simplify right side
    131,658.01x = 12,941,325,514.18
  5. Step 5: Solve for x
    x = 12,941,325,514.18/131,658.01
  6. Step 6: Final answer
    x = 98,295.01

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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.