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Finding the Fourth Proportional to 127,387.40, 191,056.80 and 38,643.80

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Solution

The fourth proportional to 127,387.40, 191,056.80 and 38,643.80 is: 57,958.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    127,387.40 : 191,056.80 = 38,643.80 : x
  2. Step 2: Convert to fraction form
    127,387.40/191,056.80 = 38,643.80/x
  3. Step 3: Cross multiply
    127,387.40x = 191,056.80 × 38,643.80
  4. Step 4: Simplify right side
    127,387.40x = 7,383,160,767.84
  5. Step 5: Solve for x
    x = 7,383,160,767.84/127,387.40
  6. Step 6: Final answer
    x = 57,958.33

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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.