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Finding the Fourth Proportional to 158,894.34, 238,337.87 and 79,987.38

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Solution

The fourth proportional to 158,894.34, 238,337.87 and 79,987.38 is: 119,979.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    158,894.34 : 238,337.87 = 79,987.38 : x
  2. Step 2: Convert to fraction form
    158,894.34/238,337.87 = 79,987.38/x
  3. Step 3: Cross multiply
    158,894.34x = 238,337.87 × 79,987.38
  4. Step 4: Simplify right side
    158,894.34x = 19,064,021,376.14
  5. Step 5: Solve for x
    x = 19,064,021,376.14/158,894.34
  6. Step 6: Final answer
    x = 119,979.24

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.