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Finding the Fourth Proportional to 128,082.76, 192,133.36 and 49,196.98

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Solution

The fourth proportional to 128,082.76, 192,133.36 and 49,196.98 is: 73,799.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,082.76 : 192,133.36 = 49,196.98 : x
  2. Step 2: Convert to fraction form
    128,082.76/192,133.36 = 49,196.98/x
  3. Step 3: Cross multiply
    128,082.76x = 192,133.36 × 49,196.98
  4. Step 4: Simplify right side
    128,082.76x = 9,452,381,069.25
  5. Step 5: Solve for x
    x = 9,452,381,069.25/128,082.76
  6. Step 6: Final answer
    x = 73,799.01

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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.