Home / 81,344.18-121,971-25,168.66

Finding the Fourth Proportional to 81,344.18, 121,971 and 25,168.66

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Solution

The fourth proportional to 81,344.18, 121,971 and 25,168.66 is: 37,738.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,344.18 : 121,971 = 25,168.66 : x
  2. Step 2: Convert to fraction form
    81,344.18/121,971 = 25,168.66/x
  3. Step 3: Cross multiply
    81,344.18x = 121,971 × 25,168.66
  4. Step 4: Simplify right side
    81,344.18x = 3,069,846,019.01
  5. Step 5: Solve for x
    x = 3,069,846,019.01/81,344.18
  6. Step 6: Final answer
    x = 37,738.98

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.