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Finding the Fourth Proportional to 86,665.50, 130,013.10 and 36,769.50

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Solution

The fourth proportional to 86,665.50, 130,013.10 and 36,769.50 is: 55,160.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    86,665.50 : 130,013.10 = 36,769.50 : x
  2. Step 2: Convert to fraction form
    86,665.50/130,013.10 = 36,769.50/x
  3. Step 3: Cross multiply
    86,665.50x = 130,013.10 × 36,769.50
  4. Step 4: Simplify right side
    86,665.50x = 4,780,516,680.45
  5. Step 5: Solve for x
    x = 4,780,516,680.45/86,665.50
  6. Step 6: Final answer
    x = 55,160.55

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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.