Home / 71,967.34-99,315.09-40,138.28

Finding the Fourth Proportional to 71,967.34, 99,315.09 and 40,138.28

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Solution

The fourth proportional to 71,967.34, 99,315.09 and 40,138.28 is: 55,390.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    71,967.34 : 99,315.09 = 40,138.28 : x
  2. Step 2: Convert to fraction form
    71,967.34/99,315.09 = 40,138.28/x
  3. Step 3: Cross multiply
    71,967.34x = 99,315.09 × 40,138.28
  4. Step 4: Simplify right side
    71,967.34x = 3,986,337,212.26
  5. Step 5: Solve for x
    x = 3,986,337,212.26/71,967.34
  6. Step 6: Final answer
    x = 55,390.92

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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.