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Finding the Fourth Proportional to 128,396.75, 192,490.73 and 53,572.62

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Solution

The fourth proportional to 128,396.75, 192,490.73 and 53,572.62 is: 80,315.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,396.75 : 192,490.73 = 53,572.62 : x
  2. Step 2: Convert to fraction form
    128,396.75/192,490.73 = 53,572.62/x
  3. Step 3: Cross multiply
    128,396.75x = 192,490.73 × 53,572.62
  4. Step 4: Simplify right side
    128,396.75x = 10,312,233,386.69
  5. Step 5: Solve for x
    x = 10,312,233,386.69/128,396.75
  6. Step 6: Final answer
    x = 80,315.38

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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.