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Finding the Fourth Proportional to 158,536.97, 218,780.96 and 86,915.46

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Solution

The fourth proportional to 158,536.97, 218,780.96 and 86,915.46 is: 119,943.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    158,536.97 : 218,780.96 = 86,915.46 : x
  2. Step 2: Convert to fraction form
    158,536.97/218,780.96 = 86,915.46/x
  3. Step 3: Cross multiply
    158,536.97x = 218,780.96 × 86,915.46
  4. Step 4: Simplify right side
    158,536.97x = 19,015,447,777.64
  5. Step 5: Solve for x
    x = 19,015,447,777.64/158,536.97
  6. Step 6: Final answer
    x = 119,943.30

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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.