Home / 128,928.12-193,401.50-53,972.88

Finding the Fourth Proportional to 128,928.12, 193,401.50 and 53,972.88

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Solution

The fourth proportional to 128,928.12, 193,401.50 and 53,972.88 is: 80,963.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,928.12 : 193,401.50 = 53,972.88 : x
  2. Step 2: Convert to fraction form
    128,928.12/193,401.50 = 53,972.88/x
  3. Step 3: Cross multiply
    128,928.12x = 193,401.50 × 53,972.88
  4. Step 4: Simplify right side
    128,928.12x = 10,438,435,681.46
  5. Step 5: Solve for x
    x = 10,438,435,681.46/128,928.12
  6. Step 6: Final answer
    x = 80,963.22

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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.