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Finding the Fourth Proportional to 86,776.70, 130,177.20 and 36,856.40

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Solution

The fourth proportional to 86,776.70, 130,177.20 and 36,856.40 is: 55,289.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    86,776.70 : 130,177.20 = 36,856.40 : x
  2. Step 2: Convert to fraction form
    86,776.70/130,177.20 = 36,856.40/x
  3. Step 3: Cross multiply
    86,776.70x = 130,177.20 × 36,856.40
  4. Step 4: Simplify right side
    86,776.70x = 4,797,862,954.08
  5. Step 5: Solve for x
    x = 4,797,862,954.08/86,776.70
  6. Step 6: Final answer
    x = 55,289.76

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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.