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Finding the Fourth Proportional to 72,599.97, 108,928.13 and 28,257.87

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Solution

The fourth proportional to 72,599.97, 108,928.13 and 28,257.87 is: 42,397.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,599.97 : 108,928.13 = 28,257.87 : x
  2. Step 2: Convert to fraction form
    72,599.97/108,928.13 = 28,257.87/x
  3. Step 3: Cross multiply
    72,599.97x = 108,928.13 × 28,257.87
  4. Step 4: Simplify right side
    72,599.97x = 3,078,076,795.59
  5. Step 5: Solve for x
    x = 3,078,076,795.59/72,599.97
  6. Step 6: Final answer
    x = 42,397.77

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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.