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Finding the Fourth Proportional to 86,720.74, 129,986.10 and 44,603.04

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Solution

The fourth proportional to 86,720.74, 129,986.10 and 44,603.04 is: 66,855.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    86,720.74 : 129,986.10 = 44,603.04 : x
  2. Step 2: Convert to fraction form
    86,720.74/129,986.10 = 44,603.04/x
  3. Step 3: Cross multiply
    86,720.74x = 129,986.10 × 44,603.04
  4. Step 4: Simplify right side
    86,720.74x = 5,797,775,217.74
  5. Step 5: Solve for x
    x = 5,797,775,217.74/86,720.74
  6. Step 6: Final answer
    x = 66,855.69

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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.