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Finding the Fourth Proportional to 86,833.80, 130,056.30 and 67,048.20

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Solution

The fourth proportional to 86,833.80, 130,056.30 and 67,048.20 is: 100,422.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    86,833.80 : 130,056.30 = 67,048.20 : x
  2. Step 2: Convert to fraction form
    86,833.80/130,056.30 = 67,048.20/x
  3. Step 3: Cross multiply
    86,833.80x = 130,056.30 × 67,048.20
  4. Step 4: Simplify right side
    86,833.80x = 8,720,040,813.66
  5. Step 5: Solve for x
    x = 8,720,040,813.66/86,833.80
  6. Step 6: Final answer
    x = 100,422.20

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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.