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Finding the Fourth Proportional to 86,373.96, 129,550.62 and 30,209.76

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Solution

The fourth proportional to 86,373.96, 129,550.62 and 30,209.76 is: 45,311.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    86,373.96 : 129,550.62 = 30,209.76 : x
  2. Step 2: Convert to fraction form
    86,373.96/129,550.62 = 30,209.76/x
  3. Step 3: Cross multiply
    86,373.96x = 129,550.62 × 30,209.76
  4. Step 4: Simplify right side
    86,373.96x = 3,913,693,138.05
  5. Step 5: Solve for x
    x = 3,913,693,138.05/86,373.96
  6. Step 6: Final answer
    x = 45,311.03

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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.