Home / 71,989.12-99,344.26-39,724

Finding the Fourth Proportional to 71,989.12, 99,344.26 and 39,724

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Solution

The fourth proportional to 71,989.12, 99,344.26 and 39,724 is: 54,818.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    71,989.12 : 99,344.26 = 39,724 : x
  2. Step 2: Convert to fraction form
    71,989.12/99,344.26 = 39,724/x
  3. Step 3: Cross multiply
    71,989.12x = 99,344.26 × 39,724
  4. Step 4: Simplify right side
    71,989.12x = 3,946,351,384.24
  5. Step 5: Solve for x
    x = 3,946,351,384.24/71,989.12
  6. Step 6: Final answer
    x = 54,818.72

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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.