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Finding the Fourth Proportional to 71,851.61, 99,157.90 and 40,022.56

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Solution

The fourth proportional to 71,851.61, 99,157.90 and 40,022.56 is: 55,232.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    71,851.61 : 99,157.90 = 40,022.56 : x
  2. Step 2: Convert to fraction form
    71,851.61/99,157.90 = 40,022.56/x
  3. Step 3: Cross multiply
    71,851.61x = 99,157.90 × 40,022.56
  4. Step 4: Simplify right side
    71,851.61x = 3,968,552,430.83
  5. Step 5: Solve for x
    x = 3,968,552,430.83/71,851.61
  6. Step 6: Final answer
    x = 55,232.62

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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.