Home / 80,721.04-121,082.28-28,130.44

Finding the Fourth Proportional to 80,721.04, 121,082.28 and 28,130.44

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Solution

The fourth proportional to 80,721.04, 121,082.28 and 28,130.44 is: 42,195.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    80,721.04 : 121,082.28 = 28,130.44 : x
  2. Step 2: Convert to fraction form
    80,721.04/121,082.28 = 28,130.44/x
  3. Step 3: Cross multiply
    80,721.04x = 121,082.28 × 28,130.44
  4. Step 4: Simplify right side
    80,721.04x = 3,406,097,812.60
  5. Step 5: Solve for x
    x = 3,406,097,812.60/80,721.04
  6. Step 6: Final answer
    x = 42,195.91

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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.