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Finding the Fourth Proportional to 158,536.62, 218,774.73 and 86,915.07

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Solution

The fourth proportional to 158,536.62, 218,774.73 and 86,915.07 is: 119,939.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    158,536.62 : 218,774.73 = 86,915.07 : x
  2. Step 2: Convert to fraction form
    158,536.62/218,774.73 = 86,915.07/x
  3. Step 3: Cross multiply
    158,536.62x = 218,774.73 × 86,915.07
  4. Step 4: Simplify right side
    158,536.62x = 19,014,820,972.18
  5. Step 5: Solve for x
    x = 19,014,820,972.18/158,536.62
  6. Step 6: Final answer
    x = 119,939.61

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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.