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Finding the Fourth Proportional to 71,463.68, 98,619.48 and 39,637.28

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Solution

The fourth proportional to 71,463.68, 98,619.48 and 39,637.28 is: 54,699.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    71,463.68 : 98,619.48 = 39,637.28 : x
  2. Step 2: Convert to fraction form
    71,463.68/98,619.48 = 39,637.28/x
  3. Step 3: Cross multiply
    71,463.68x = 98,619.48 × 39,637.28
  4. Step 4: Simplify right side
    71,463.68x = 3,909,007,942.21
  5. Step 5: Solve for x
    x = 3,909,007,942.21/71,463.68
  6. Step 6: Final answer
    x = 54,699.23

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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.