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Finding the Fourth Proportional to 72,363.78, 99,860.85 and 40,532.58

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Solution

The fourth proportional to 72,363.78, 99,860.85 and 40,532.58 is: 55,934.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,363.78 : 99,860.85 = 40,532.58 : x
  2. Step 2: Convert to fraction form
    72,363.78/99,860.85 = 40,532.58/x
  3. Step 3: Cross multiply
    72,363.78x = 99,860.85 × 40,532.58
  4. Step 4: Simplify right side
    72,363.78x = 4,047,617,891.49
  5. Step 5: Solve for x
    x = 4,047,617,891.49/72,363.78
  6. Step 6: Final answer
    x = 55,934.31

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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.