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Finding the Fourth Proportional to 86,294.75, 129,488.63 and 36,409.42

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Solution

The fourth proportional to 86,294.75, 129,488.63 and 36,409.42 is: 54,633.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    86,294.75 : 129,488.63 = 36,409.42 : x
  2. Step 2: Convert to fraction form
    86,294.75/129,488.63 = 36,409.42/x
  3. Step 3: Cross multiply
    86,294.75x = 129,488.63 × 36,409.42
  4. Step 4: Simplify right side
    86,294.75x = 4,714,605,473.54
  5. Step 5: Solve for x
    x = 4,714,605,473.54/86,294.75
  6. Step 6: Final answer
    x = 54,633.75

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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.