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Finding the Fourth Proportional to 71,868.41, 99,178.53 and 40,038.44

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Solution

The fourth proportional to 71,868.41, 99,178.53 and 40,038.44 is: 55,253.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    71,868.41 : 99,178.53 = 40,038.44 : x
  2. Step 2: Convert to fraction form
    71,868.41/99,178.53 = 40,038.44/x
  3. Step 3: Cross multiply
    71,868.41x = 99,178.53 × 40,038.44
  4. Step 4: Simplify right side
    71,868.41x = 3,970,953,622.69
  5. Step 5: Solve for x
    x = 3,970,953,622.69/71,868.41
  6. Step 6: Final answer
    x = 55,253.12

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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.