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Finding the Fourth Proportional to 131,888, 182,005.44 and 72,272

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Solution

The fourth proportional to 131,888, 182,005.44 and 72,272 is: 99,735.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    131,888 : 182,005.44 = 72,272 : x
  2. Step 2: Convert to fraction form
    131,888/182,005.44 = 72,272/x
  3. Step 3: Cross multiply
    131,888x = 182,005.44 × 72,272
  4. Step 4: Simplify right side
    131,888x = 13,153,897,159.68
  5. Step 5: Solve for x
    x = 13,153,897,159.68/131,888
  6. Step 6: Final answer
    x = 99,735.36

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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.