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Finding the Fourth Proportional to 71,401.79, 106,903.01 and 53,816.51

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Solution

The fourth proportional to 71,401.79, 106,903.01 and 53,816.51 is: 80,574.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    71,401.79 : 106,903.01 = 53,816.51 : x
  2. Step 2: Convert to fraction form
    71,401.79/106,903.01 = 53,816.51/x
  3. Step 3: Cross multiply
    71,401.79x = 106,903.01 × 53,816.51
  4. Step 4: Simplify right side
    71,401.79x = 5,753,146,637.61
  5. Step 5: Solve for x
    x = 5,753,146,637.61/71,401.79
  6. Step 6: Final answer
    x = 80,574.26

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.