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Finding the Fourth Proportional to 71,963.66, 99,307.64 and 40,137.94

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Solution

The fourth proportional to 71,963.66, 99,307.64 and 40,137.94 is: 55,389.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    71,963.66 : 99,307.64 = 40,137.94 : x
  2. Step 2: Convert to fraction form
    71,963.66/99,307.64 = 40,137.94/x
  3. Step 3: Cross multiply
    71,963.66x = 99,307.64 × 40,137.94
  4. Step 4: Simplify right side
    71,963.66x = 3,986,004,095.86
  5. Step 5: Solve for x
    x = 3,986,004,095.86/71,963.66
  6. Step 6: Final answer
    x = 55,389.12

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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.