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Finding the Fourth Proportional to 127,988.80, 191,738.40 and 68,804.80

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Solution

The fourth proportional to 127,988.80, 191,738.40 and 68,804.80 is: 103,075.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    127,988.80 : 191,738.40 = 68,804.80 : x
  2. Step 2: Convert to fraction form
    127,988.80/191,738.40 = 68,804.80/x
  3. Step 3: Cross multiply
    127,988.80x = 191,738.40 × 68,804.80
  4. Step 4: Simplify right side
    127,988.80x = 13,192,522,264.32
  5. Step 5: Solve for x
    x = 13,192,522,264.32/127,988.80
  6. Step 6: Final answer
    x = 103,075.60

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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.