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Finding the Fourth Proportional to 89,812.74, 134,631.09 and 76,515.78

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Solution

The fourth proportional to 89,812.74, 134,631.09 and 76,515.78 is: 114,698.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    89,812.74 : 134,631.09 = 76,515.78 : x
  2. Step 2: Convert to fraction form
    89,812.74/134,631.09 = 76,515.78/x
  3. Step 3: Cross multiply
    89,812.74x = 134,631.09 × 76,515.78
  4. Step 4: Simplify right side
    89,812.74x = 10,301,402,863.60
  5. Step 5: Solve for x
    x = 10,301,402,863.60/89,812.74
  6. Step 6: Final answer
    x = 114,698.68

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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.