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Finding the Fourth Proportional to 86,717.79, 130,073.72 and 36,765.72

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Solution

The fourth proportional to 86,717.79, 130,073.72 and 36,765.72 is: 55,147.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    86,717.79 : 130,073.72 = 36,765.72 : x
  2. Step 2: Convert to fraction form
    86,717.79/130,073.72 = 36,765.72/x
  3. Step 3: Cross multiply
    86,717.79x = 130,073.72 × 36,765.72
  4. Step 4: Simplify right side
    86,717.79x = 4,782,253,785.05
  5. Step 5: Solve for x
    x = 4,782,253,785.05/86,717.79
  6. Step 6: Final answer
    x = 55,147.32

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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.