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Finding the Fourth Proportional to 127,907.80, 191,916.97 and 68,674.30

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Solution

The fourth proportional to 127,907.80, 191,916.97 and 68,674.30 is: 103,041.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    127,907.80 : 191,916.97 = 68,674.30 : x
  2. Step 2: Convert to fraction form
    127,907.80/191,916.97 = 68,674.30/x
  3. Step 3: Cross multiply
    127,907.80x = 191,916.97 × 68,674.30
  4. Step 4: Simplify right side
    127,907.80x = 13,179,763,572.87
  5. Step 5: Solve for x
    x = 13,179,763,572.87/127,907.80
  6. Step 6: Final answer
    x = 103,041.12

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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.