Home / 80,588.60-120,882.27-21,428.45

Finding the Fourth Proportional to 80,588.60, 120,882.27 and 21,428.45

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Solution

The fourth proportional to 80,588.60, 120,882.27 and 21,428.45 is: 32,142.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    80,588.60 : 120,882.27 = 21,428.45 : x
  2. Step 2: Convert to fraction form
    80,588.60/120,882.27 = 21,428.45/x
  3. Step 3: Cross multiply
    80,588.60x = 120,882.27 × 21,428.45
  4. Step 4: Simplify right side
    80,588.60x = 2,590,319,678.58
  5. Step 5: Solve for x
    x = 2,590,319,678.58/80,588.60
  6. Step 6: Final answer
    x = 32,142.51

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1.5x scale

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.