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Finding the Fourth Proportional to 72,959.56, 109,359.15 and 28,578.04

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Solution

The fourth proportional to 72,959.56, 109,359.15 and 28,578.04 is: 42,835.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,959.56 : 109,359.15 = 28,578.04 : x
  2. Step 2: Convert to fraction form
    72,959.56/109,359.15 = 28,578.04/x
  3. Step 3: Cross multiply
    72,959.56x = 109,359.15 × 28,578.04
  4. Step 4: Simplify right side
    72,959.56x = 3,125,270,163.07
  5. Step 5: Solve for x
    x = 3,125,270,163.07/72,959.56
  6. Step 6: Final answer
    x = 42,835.65

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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.