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Finding the Fourth Proportional to 72,578.18, 108,874.11 and 28,208.33

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Solution

The fourth proportional to 72,578.18, 108,874.11 and 28,208.33 is: 42,315.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,578.18 : 108,874.11 = 28,208.33 : x
  2. Step 2: Convert to fraction form
    72,578.18/108,874.11 = 28,208.33/x
  3. Step 3: Cross multiply
    72,578.18x = 108,874.11 × 28,208.33
  4. Step 4: Simplify right side
    72,578.18x = 3,071,156,823.34
  5. Step 5: Solve for x
    x = 3,071,156,823.34/72,578.18
  6. Step 6: Final answer
    x = 42,315.15

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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.