Home / 80,583.17-120,875.85-21,418.53

Finding the Fourth Proportional to 80,583.17, 120,875.85 and 21,418.53

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Solution

The fourth proportional to 80,583.17, 120,875.85 and 21,418.53 is: 32,128.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    80,583.17 : 120,875.85 = 21,418.53 : x
  2. Step 2: Convert to fraction form
    80,583.17/120,875.85 = 21,418.53/x
  3. Step 3: Cross multiply
    80,583.17x = 120,875.85 × 21,418.53
  4. Step 4: Simplify right side
    80,583.17x = 2,588,983,019.50
  5. Step 5: Solve for x
    x = 2,588,983,019.50/80,583.17
  6. Step 6: Final answer
    x = 32,128.09

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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.