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Finding the Fourth Proportional to 86,429.74, 129,558.48 and 36,522.40

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Solution

The fourth proportional to 86,429.74, 129,558.48 and 36,522.40 is: 54,747.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    86,429.74 : 129,558.48 = 36,522.40 : x
  2. Step 2: Convert to fraction form
    86,429.74/129,558.48 = 36,522.40/x
  3. Step 3: Cross multiply
    86,429.74x = 129,558.48 × 36,522.40
  4. Step 4: Simplify right side
    86,429.74x = 4,731,786,629.95
  5. Step 5: Solve for x
    x = 4,731,786,629.95/86,429.74
  6. Step 6: Final answer
    x = 54,747.20

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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.