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Finding the Fourth Proportional to 71,804.64, 99,088.08 and 39,972.48

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Solution

The fourth proportional to 71,804.64, 99,088.08 and 39,972.48 is: 55,160.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    71,804.64 : 99,088.08 = 39,972.48 : x
  2. Step 2: Convert to fraction form
    71,804.64/99,088.08 = 39,972.48/x
  3. Step 3: Cross multiply
    71,804.64x = 99,088.08 × 39,972.48
  4. Step 4: Simplify right side
    71,804.64x = 3,960,796,296.04
  5. Step 5: Solve for x
    x = 3,960,796,296.04/71,804.64
  6. Step 6: Final answer
    x = 55,160.73

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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.