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Finding the Fourth Proportional to 86,499.83, 129,710.76 and 36,554.21

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Solution

The fourth proportional to 86,499.83, 129,710.76 and 36,554.21 is: 54,814.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    86,499.83 : 129,710.76 = 36,554.21 : x
  2. Step 2: Convert to fraction form
    86,499.83/129,710.76 = 36,554.21/x
  3. Step 3: Cross multiply
    86,499.83x = 129,710.76 × 36,554.21
  4. Step 4: Simplify right side
    86,499.83x = 4,741,473,711.75
  5. Step 5: Solve for x
    x = 4,741,473,711.75/86,499.83
  6. Step 6: Final answer
    x = 54,814.84

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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.