Home / 128,928.34-193,392.25-72,742.95

Finding the Fourth Proportional to 128,928.34, 193,392.25 and 72,742.95

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Solution

The fourth proportional to 128,928.34, 193,392.25 and 72,742.95 is: 109,114.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,928.34 : 193,392.25 = 72,742.95 : x
  2. Step 2: Convert to fraction form
    128,928.34/193,392.25 = 72,742.95/x
  3. Step 3: Cross multiply
    128,928.34x = 193,392.25 × 72,742.95
  4. Step 4: Simplify right side
    128,928.34x = 14,067,922,772.14
  5. Step 5: Solve for x
    x = 14,067,922,772.14/128,928.34
  6. Step 6: Final answer
    x = 109,114.28

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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.