Home / 87,981.62-131,972.69-21,421.74

Finding the Fourth Proportional to 87,981.62, 131,972.69 and 21,421.74

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Solution

The fourth proportional to 87,981.62, 131,972.69 and 21,421.74 is: 32,132.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    87,981.62 : 131,972.69 = 21,421.74 : x
  2. Step 2: Convert to fraction form
    87,981.62/131,972.69 = 21,421.74/x
  3. Step 3: Cross multiply
    87,981.62x = 131,972.69 × 21,421.74
  4. Step 4: Simplify right side
    87,981.62x = 2,827,084,652.28
  5. Step 5: Solve for x
    x = 2,827,084,652.28/87,981.62
  6. Step 6: Final answer
    x = 32,132.67

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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.