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Finding the Fourth Proportional to 86,541.70, 129,812.55 and 49,087.30

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Solution

The fourth proportional to 86,541.70, 129,812.55 and 49,087.30 is: 73,630.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    86,541.70 : 129,812.55 = 49,087.30 : x
  2. Step 2: Convert to fraction form
    86,541.70/129,812.55 = 49,087.30/x
  3. Step 3: Cross multiply
    86,541.70x = 129,812.55 × 49,087.30
  4. Step 4: Simplify right side
    86,541.70x = 6,372,147,585.62
  5. Step 5: Solve for x
    x = 6,372,147,585.62/86,541.70
  6. Step 6: Final answer
    x = 73,630.95

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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.