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Finding the Fourth Proportional to 128,482.28, 192,703.98 and 34,995.40

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Solution

The fourth proportional to 128,482.28, 192,703.98 and 34,995.40 is: 52,487.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,482.28 : 192,703.98 = 34,995.40 : x
  2. Step 2: Convert to fraction form
    128,482.28/192,703.98 = 34,995.40/x
  3. Step 3: Cross multiply
    128,482.28x = 192,703.98 × 34,995.40
  4. Step 4: Simplify right side
    128,482.28x = 6,743,752,861.69
  5. Step 5: Solve for x
    x = 6,743,752,861.69/128,482.28
  6. Step 6: Final answer
    x = 52,487.81

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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.