Home / 71,971.41-99,320.54-40,139.63

Finding the Fourth Proportional to 71,971.41, 99,320.54 and 40,139.63

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Solution

The fourth proportional to 71,971.41, 99,320.54 and 40,139.63 is: 55,392.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    71,971.41 : 99,320.54 = 40,139.63 : x
  2. Step 2: Convert to fraction form
    71,971.41/99,320.54 = 40,139.63/x
  3. Step 3: Cross multiply
    71,971.41x = 99,320.54 × 40,139.63
  4. Step 4: Simplify right side
    71,971.41x = 3,986,689,029.70
  5. Step 5: Solve for x
    x = 3,986,689,029.70/71,971.41
  6. Step 6: Final answer
    x = 55,392.68

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1.5x scale

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.