Home / 71,968.54-99,309.70-40,139.52

Finding the Fourth Proportional to 71,968.54, 99,309.70 and 40,139.52

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Solution

The fourth proportional to 71,968.54, 99,309.70 and 40,139.52 is: 55,388.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    71,968.54 : 99,309.70 = 40,139.52 : x
  2. Step 2: Convert to fraction form
    71,968.54/99,309.70 = 40,139.52/x
  3. Step 3: Cross multiply
    71,968.54x = 99,309.70 × 40,139.52
  4. Step 4: Simplify right side
    71,968.54x = 3,986,243,689.34
  5. Step 5: Solve for x
    x = 3,986,243,689.34/71,968.54
  6. Step 6: Final answer
    x = 55,388.70

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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.