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Finding the Fourth Proportional to 72,438.76, 108,599.64 and 28,042.84

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Solution

The fourth proportional to 72,438.76, 108,599.64 and 28,042.84 is: 42,041.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,438.76 : 108,599.64 = 28,042.84 : x
  2. Step 2: Convert to fraction form
    72,438.76/108,599.64 = 28,042.84/x
  3. Step 3: Cross multiply
    72,438.76x = 108,599.64 × 28,042.84
  4. Step 4: Simplify right side
    72,438.76x = 3,045,442,328.58
  5. Step 5: Solve for x
    x = 3,045,442,328.58/72,438.76
  6. Step 6: Final answer
    x = 42,041.61

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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.