Home / 72,138.76-99,544.38-40,306.96

Finding the Fourth Proportional to 72,138.76, 99,544.38 and 40,306.96

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Solution

The fourth proportional to 72,138.76, 99,544.38 and 40,306.96 is: 55,619.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,138.76 : 99,544.38 = 40,306.96 : x
  2. Step 2: Convert to fraction form
    72,138.76/99,544.38 = 40,306.96/x
  3. Step 3: Cross multiply
    72,138.76x = 99,544.38 × 40,306.96
  4. Step 4: Simplify right side
    72,138.76x = 4,012,331,342.88
  5. Step 5: Solve for x
    x = 4,012,331,342.88/72,138.76
  6. Step 6: Final answer
    x = 55,619.63

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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.