Home / 80,421.00-120,631.95-21,256.04

Finding the Fourth Proportional to 80,421.00, 120,631.95 and 21,256.04

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Solution

The fourth proportional to 80,421.00, 120,631.95 and 21,256.04 is: 31,884.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    80,421.00 : 120,631.95 = 21,256.04 : x
  2. Step 2: Convert to fraction form
    80,421.00/120,631.95 = 21,256.04/x
  3. Step 3: Cross multiply
    80,421.00x = 120,631.95 × 21,256.04
  4. Step 4: Simplify right side
    80,421.00x = 2,564,157,554.48
  5. Step 5: Solve for x
    x = 2,564,157,554.48/80,421.00
  6. Step 6: Final answer
    x = 31,884.18

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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.