Home / 120,863.32-166,811.36-100,688.24

Finding the Fourth Proportional to 120,863.32, 166,811.36 and 100,688.24

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Solution

The fourth proportional to 120,863.32, 166,811.36 and 100,688.24 is: 138,966.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    120,863.32 : 166,811.36 = 100,688.24 : x
  2. Step 2: Convert to fraction form
    120,863.32/166,811.36 = 100,688.24/x
  3. Step 3: Cross multiply
    120,863.32x = 166,811.36 × 100,688.24
  4. Step 4: Simplify right side
    120,863.32x = 16,795,942,250.41
  5. Step 5: Solve for x
    x = 16,795,942,250.41/120,863.32
  6. Step 6: Final answer
    x = 138,966.41

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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.