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Finding the Fourth Proportional to 128,229.84, 192,172.82 and 99,801.13

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Solution

The fourth proportional to 128,229.84, 192,172.82 and 99,801.13 is: 149,567.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,229.84 : 192,172.82 = 99,801.13 : x
  2. Step 2: Convert to fraction form
    128,229.84/192,172.82 = 99,801.13/x
  3. Step 3: Cross multiply
    128,229.84x = 192,172.82 × 99,801.13
  4. Step 4: Simplify right side
    128,229.84x = 19,179,064,591.29
  5. Step 5: Solve for x
    x = 19,179,064,591.29/128,229.84
  6. Step 6: Final answer
    x = 149,567.87

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1.5x scale

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.