Home / 80,967.21-121,465.40-38,811.57

Finding the Fourth Proportional to 80,967.21, 121,465.40 and 38,811.57

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Solution

The fourth proportional to 80,967.21, 121,465.40 and 38,811.57 is: 58,224.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    80,967.21 : 121,465.40 = 38,811.57 : x
  2. Step 2: Convert to fraction form
    80,967.21/121,465.40 = 38,811.57/x
  3. Step 3: Cross multiply
    80,967.21x = 121,465.40 × 38,811.57
  4. Step 4: Simplify right side
    80,967.21x = 4,714,262,680.62
  5. Step 5: Solve for x
    x = 4,714,262,680.62/80,967.21
  6. Step 6: Final answer
    x = 58,224.34

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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.