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Finding the Fourth Proportional to 86,732.70, 130,111.20 and 36,812.40

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Solution

The fourth proportional to 86,732.70, 130,111.20 and 36,812.40 is: 55,223.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    86,732.70 : 130,111.20 = 36,812.40 : x
  2. Step 2: Convert to fraction form
    86,732.70/130,111.20 = 36,812.40/x
  3. Step 3: Cross multiply
    86,732.70x = 130,111.20 × 36,812.40
  4. Step 4: Simplify right side
    86,732.70x = 4,789,705,538.88
  5. Step 5: Solve for x
    x = 4,789,705,538.88/86,732.70
  6. Step 6: Final answer
    x = 55,223.76

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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.