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Finding the Fourth Proportional to 128,476.29, 192,732.95 and 39,736.71

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Solution

The fourth proportional to 128,476.29, 192,732.95 and 39,736.71 is: 59,610.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,476.29 : 192,732.95 = 39,736.71 : x
  2. Step 2: Convert to fraction form
    128,476.29/192,732.95 = 39,736.71/x
  3. Step 3: Cross multiply
    128,476.29x = 192,732.95 × 39,736.71
  4. Step 4: Simplify right side
    128,476.29x = 7,658,573,440.94
  5. Step 5: Solve for x
    x = 7,658,573,440.94/128,476.29
  6. Step 6: Final answer
    x = 59,610.79

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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.