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Finding the Fourth Proportional to 127,990.53, 191,987.01 and 39,244.50

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Solution

The fourth proportional to 127,990.53, 191,987.01 and 39,244.50 is: 58,867.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    127,990.53 : 191,987.01 = 39,244.50 : x
  2. Step 2: Convert to fraction form
    127,990.53/191,987.01 = 39,244.50/x
  3. Step 3: Cross multiply
    127,990.53x = 191,987.01 × 39,244.50
  4. Step 4: Simplify right side
    127,990.53x = 7,534,434,213.95
  5. Step 5: Solve for x
    x = 7,534,434,213.95/127,990.53
  6. Step 6: Final answer
    x = 58,867.12

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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.