Home / 80,972.81-121,445.45-21,795.29

Finding the Fourth Proportional to 80,972.81, 121,445.45 and 21,795.29

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Solution

The fourth proportional to 80,972.81, 121,445.45 and 21,795.29 is: 32,689.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    80,972.81 : 121,445.45 = 21,795.29 : x
  2. Step 2: Convert to fraction form
    80,972.81/121,445.45 = 21,795.29/x
  3. Step 3: Cross multiply
    80,972.81x = 121,445.45 × 21,795.29
  4. Step 4: Simplify right side
    80,972.81x = 2,646,938,692.95
  5. Step 5: Solve for x
    x = 2,646,938,692.95/80,972.81
  6. Step 6: Final answer
    x = 32,689.23

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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.