Home / 86,638.60-129,982.20-36,742.60

Finding the Fourth Proportional to 86,638.60, 129,982.20 and 36,742.60

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Solution

The fourth proportional to 86,638.60, 129,982.20 and 36,742.60 is: 55,124.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    86,638.60 : 129,982.20 = 36,742.60 : x
  2. Step 2: Convert to fraction form
    86,638.60/129,982.20 = 36,742.60/x
  3. Step 3: Cross multiply
    86,638.60x = 129,982.20 × 36,742.60
  4. Step 4: Simplify right side
    86,638.60x = 4,775,883,981.72
  5. Step 5: Solve for x
    x = 4,775,883,981.72/86,638.60
  6. Step 6: Final answer
    x = 55,124.21

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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.