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Finding the Fourth Proportional to 72,813.60, 100,487.52 and 40,979.52

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Solution

The fourth proportional to 72,813.60, 100,487.52 and 40,979.52 is: 56,554.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,813.60 : 100,487.52 = 40,979.52 : x
  2. Step 2: Convert to fraction form
    72,813.60/100,487.52 = 40,979.52/x
  3. Step 3: Cross multiply
    72,813.60x = 100,487.52 × 40,979.52
  4. Step 4: Simplify right side
    72,813.60x = 4,117,930,335.59
  5. Step 5: Solve for x
    x = 4,117,930,335.59/72,813.60
  6. Step 6: Final answer
    x = 56,554.41

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.