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Finding the Fourth Proportional to 86,852.80, 130,084.80 and 67,067.20

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Solution

The fourth proportional to 86,852.80, 130,084.80 and 67,067.20 is: 100,450.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    86,852.80 : 130,084.80 = 67,067.20 : x
  2. Step 2: Convert to fraction form
    86,852.80/130,084.80 = 67,067.20/x
  3. Step 3: Cross multiply
    86,852.80x = 130,084.80 × 67,067.20
  4. Step 4: Simplify right side
    86,852.80x = 8,724,423,298.56
  5. Step 5: Solve for x
    x = 8,724,423,298.56/86,852.80
  6. Step 6: Final answer
    x = 100,450.69

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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.