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Finding the Fourth Proportional to 128,308.94, 192,451.04 and 39,538.61

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Solution

The fourth proportional to 128,308.94, 192,451.04 and 39,538.61 is: 59,304.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,308.94 : 192,451.04 = 39,538.61 : x
  2. Step 2: Convert to fraction form
    128,308.94/192,451.04 = 39,538.61/x
  3. Step 3: Cross multiply
    128,308.94x = 192,451.04 × 39,538.61
  4. Step 4: Simplify right side
    128,308.94x = 7,609,246,416.96
  5. Step 5: Solve for x
    x = 7,609,246,416.96/128,308.94
  6. Step 6: Final answer
    x = 59,304.10

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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.