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Finding the Fourth Proportional to 86,568.90, 129,853.35 and 76,200.90

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Solution

The fourth proportional to 86,568.90, 129,853.35 and 76,200.90 is: 114,301.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    86,568.90 : 129,853.35 = 76,200.90 : x
  2. Step 2: Convert to fraction form
    86,568.90/129,853.35 = 76,200.90/x
  3. Step 3: Cross multiply
    86,568.90x = 129,853.35 × 76,200.90
  4. Step 4: Simplify right side
    86,568.90x = 9,894,942,138.02
  5. Step 5: Solve for x
    x = 9,894,942,138.02/86,568.90
  6. Step 6: Final answer
    x = 114,301.35

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1.5x scale

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.