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Finding the Fourth Proportional to 86,661.60, 130,016.70 and 36,765.60

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Solution

The fourth proportional to 86,661.60, 130,016.70 and 36,765.60 is: 55,158.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    86,661.60 : 130,016.70 = 36,765.60 : x
  2. Step 2: Convert to fraction form
    86,661.60/130,016.70 = 36,765.60/x
  3. Step 3: Cross multiply
    86,661.60x = 130,016.70 × 36,765.60
  4. Step 4: Simplify right side
    86,661.60x = 4,780,141,985.52
  5. Step 5: Solve for x
    x = 4,780,141,985.52/86,661.60
  6. Step 6: Final answer
    x = 55,158.71

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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.