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Finding the Fourth Proportional to 72,627.86, 108,907.76 and 30,498.95

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Solution

The fourth proportional to 72,627.86, 108,907.76 and 30,498.95 is: 45,734.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,627.86 : 108,907.76 = 30,498.95 : x
  2. Step 2: Convert to fraction form
    72,627.86/108,907.76 = 30,498.95/x
  3. Step 3: Cross multiply
    72,627.86x = 108,907.76 × 30,498.95
  4. Step 4: Simplify right side
    72,627.86x = 3,321,572,326.85
  5. Step 5: Solve for x
    x = 3,321,572,326.85/72,627.86
  6. Step 6: Final answer
    x = 45,734.13

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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.