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Finding the Fourth Proportional to 173,438, 239,383 and 105,440.56

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Solution

The fourth proportional to 173,438, 239,383 and 105,440.56 is: 145,531.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    173,438 : 239,383 = 105,440.56 : x
  2. Step 2: Convert to fraction form
    173,438/239,383 = 105,440.56/x
  3. Step 3: Cross multiply
    173,438x = 239,383 × 105,440.56
  4. Step 4: Simplify right side
    173,438x = 25,240,677,574.48
  5. Step 5: Solve for x
    x = 25,240,677,574.48/173,438
  6. Step 6: Final answer
    x = 145,531.42

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.