Home / 72,898.05-109,356.33-28,519.11

Finding the Fourth Proportional to 72,898.05, 109,356.33 and 28,519.11

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Solution

The fourth proportional to 72,898.05, 109,356.33 and 28,519.11 is: 42,782.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,898.05 : 109,356.33 = 28,519.11 : x
  2. Step 2: Convert to fraction form
    72,898.05/109,356.33 = 28,519.11/x
  3. Step 3: Cross multiply
    72,898.05x = 109,356.33 × 28,519.11
  4. Step 4: Simplify right side
    72,898.05x = 3,118,745,204.47
  5. Step 5: Solve for x
    x = 3,118,745,204.47/72,898.05
  6. Step 6: Final answer
    x = 42,782.29

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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.