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Finding the Fourth Proportional to 86,812.70, 130,231.20 and 36,892.40

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Solution

The fourth proportional to 86,812.70, 130,231.20 and 36,892.40 is: 55,343.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    86,812.70 : 130,231.20 = 36,892.40 : x
  2. Step 2: Convert to fraction form
    86,812.70/130,231.20 = 36,892.40/x
  3. Step 3: Cross multiply
    86,812.70x = 130,231.20 × 36,892.40
  4. Step 4: Simplify right side
    86,812.70x = 4,804,541,522.88
  5. Step 5: Solve for x
    x = 4,804,541,522.88/86,812.70
  6. Step 6: Final answer
    x = 55,343.76

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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.