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Finding the Fourth Proportional to 86,902.70, 130,366.20 and 36,982.40

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Solution

The fourth proportional to 86,902.70, 130,366.20 and 36,982.40 is: 55,478.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    86,902.70 : 130,366.20 = 36,982.40 : x
  2. Step 2: Convert to fraction form
    86,902.70/130,366.20 = 36,982.40/x
  3. Step 3: Cross multiply
    86,902.70x = 130,366.20 × 36,982.40
  4. Step 4: Simplify right side
    86,902.70x = 4,821,254,954.88
  5. Step 5: Solve for x
    x = 4,821,254,954.88/86,902.70
  6. Step 6: Final answer
    x = 55,478.77

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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.