Home / 80,905.85-121,358.67-21,741.53

Finding the Fourth Proportional to 80,905.85, 121,358.67 and 21,741.53

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Solution

The fourth proportional to 80,905.85, 121,358.67 and 21,741.53 is: 32,612.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    80,905.85 : 121,358.67 = 21,741.53 : x
  2. Step 2: Convert to fraction form
    80,905.85/121,358.67 = 21,741.53/x
  3. Step 3: Cross multiply
    80,905.85x = 121,358.67 × 21,741.53
  4. Step 4: Simplify right side
    80,905.85x = 2,638,522,557.77
  5. Step 5: Solve for x
    x = 2,638,522,557.77/80,905.85
  6. Step 6: Final answer
    x = 32,612.26

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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.