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Finding the Fourth Proportional to 71,795.64, 99,075.66 and 39,963.48

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Solution

The fourth proportional to 71,795.64, 99,075.66 and 39,963.48 is: 55,148.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    71,795.64 : 99,075.66 = 39,963.48 : x
  2. Step 2: Convert to fraction form
    71,795.64/99,075.66 = 39,963.48/x
  3. Step 3: Cross multiply
    71,795.64x = 99,075.66 × 39,963.48
  4. Step 4: Simplify right side
    71,795.64x = 3,959,408,156.90
  5. Step 5: Solve for x
    x = 3,959,408,156.90/71,795.64
  6. Step 6: Final answer
    x = 55,148.31

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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.