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Finding the Fourth Proportional to 86,118.80, 129,228.41 and 36,195.05

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Solution

The fourth proportional to 86,118.80, 129,228.41 and 36,195.05 is: 54,313.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    86,118.80 : 129,228.41 = 36,195.05 : x
  2. Step 2: Convert to fraction form
    86,118.80/129,228.41 = 36,195.05/x
  3. Step 3: Cross multiply
    86,118.80x = 129,228.41 × 36,195.05
  4. Step 4: Simplify right side
    86,118.80x = 4,677,429,174.93
  5. Step 5: Solve for x
    x = 4,677,429,174.93/86,118.80
  6. Step 6: Final answer
    x = 54,313.69

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1.5x scale

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.