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Finding the Fourth Proportional to 127,975.80, 191,718.90 and 68,791.80

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Solution

The fourth proportional to 127,975.80, 191,718.90 and 68,791.80 is: 103,056.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    127,975.80 : 191,718.90 = 68,791.80 : x
  2. Step 2: Convert to fraction form
    127,975.80/191,718.90 = 68,791.80/x
  3. Step 3: Cross multiply
    127,975.80x = 191,718.90 × 68,791.80
  4. Step 4: Simplify right side
    127,975.80x = 13,188,688,225.02
  5. Step 5: Solve for x
    x = 13,188,688,225.02/127,975.80
  6. Step 6: Final answer
    x = 103,056.11

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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.