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Finding the Fourth Proportional to 131,624, 181,645.44 and 72,008

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Solution

The fourth proportional to 131,624, 181,645.44 and 72,008 is: 99,373.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    131,624 : 181,645.44 = 72,008 : x
  2. Step 2: Convert to fraction form
    131,624/181,645.44 = 72,008/x
  3. Step 3: Cross multiply
    131,624x = 181,645.44 × 72,008
  4. Step 4: Simplify right side
    131,624x = 13,079,924,843.52
  5. Step 5: Solve for x
    x = 13,079,924,843.52/131,624
  6. Step 6: Final answer
    x = 99,373.40

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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.