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Finding the Fourth Proportional to 158,911.60, 238,561.80 and 87,890.80

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Solution

The fourth proportional to 158,911.60, 238,561.80 and 87,890.80 is: 131,943.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    158,911.60 : 238,561.80 = 87,890.80 : x
  2. Step 2: Convert to fraction form
    158,911.60/238,561.80 = 87,890.80/x
  3. Step 3: Cross multiply
    158,911.60x = 238,561.80 × 87,890.80
  4. Step 4: Simplify right side
    158,911.60x = 20,967,387,451.44
  5. Step 5: Solve for x
    x = 20,967,387,451.44/158,911.60
  6. Step 6: Final answer
    x = 131,943.72

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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.