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Finding the Fourth Proportional to 128,215, 192,300.18 and 34,698.88

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Solution

The fourth proportional to 128,215, 192,300.18 and 34,698.88 is: 52,042.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,215 : 192,300.18 = 34,698.88 : x
  2. Step 2: Convert to fraction form
    128,215/192,300.18 = 34,698.88/x
  3. Step 3: Cross multiply
    128,215x = 192,300.18 × 34,698.88
  4. Step 4: Simplify right side
    128,215x = 6,672,600,869.80
  5. Step 5: Solve for x
    x = 6,672,600,869.80/128,215
  6. Step 6: Final answer
    x = 52,042.28

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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.