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Finding the Fourth Proportional to 158,786.88, 219,112.08 and 87,166.80

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Solution

The fourth proportional to 158,786.88, 219,112.08 and 87,166.80 is: 120,282.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    158,786.88 : 219,112.08 = 87,166.80 : x
  2. Step 2: Convert to fraction form
    158,786.88/219,112.08 = 87,166.80/x
  3. Step 3: Cross multiply
    158,786.88x = 219,112.08 × 87,166.80
  4. Step 4: Simplify right side
    158,786.88x = 19,099,298,854.94
  5. Step 5: Solve for x
    x = 19,099,298,854.94/158,786.88
  6. Step 6: Final answer
    x = 120,282.60

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1.5x scale

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.