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Finding the Fourth Proportional to 127,968.70, 191,693.85 and 72,499.90

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Solution

The fourth proportional to 127,968.70, 191,693.85 and 72,499.90 is: 108,603.00

Step by Step Solution

  1. Step 1: Write the proportion equation
    127,968.70 : 191,693.85 = 72,499.90 : x
  2. Step 2: Convert to fraction form
    127,968.70/191,693.85 = 72,499.90/x
  3. Step 3: Cross multiply
    127,968.70x = 191,693.85 × 72,499.90
  4. Step 4: Simplify right side
    127,968.70x = 13,897,784,955.62
  5. Step 5: Solve for x
    x = 13,897,784,955.62/127,968.70
  6. Step 6: Final answer
    x = 108,603.00

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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.