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Finding the Fourth Proportional to 86,919.60, 130,537.80 and 76,033.20

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Solution

The fourth proportional to 86,919.60, 130,537.80 and 76,033.20 is: 114,188.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    86,919.60 : 130,537.80 = 76,033.20 : x
  2. Step 2: Convert to fraction form
    86,919.60/130,537.80 = 76,033.20/x
  3. Step 3: Cross multiply
    86,919.60x = 130,537.80 × 76,033.20
  4. Step 4: Simplify right side
    86,919.60x = 9,925,206,654.96
  5. Step 5: Solve for x
    x = 9,925,206,654.96/86,919.60
  6. Step 6: Final answer
    x = 114,188.36

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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.