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Finding the Fourth Proportional to 136,880.80, 188,895.12 and 77,264.80

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Solution

The fourth proportional to 136,880.80, 188,895.12 and 77,264.80 is: 106,625.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    136,880.80 : 188,895.12 = 77,264.80 : x
  2. Step 2: Convert to fraction form
    136,880.80/188,895.12 = 77,264.80/x
  3. Step 3: Cross multiply
    136,880.80x = 188,895.12 × 77,264.80
  4. Step 4: Simplify right side
    136,880.80x = 14,594,943,667.78
  5. Step 5: Solve for x
    x = 14,594,943,667.78/136,880.80
  6. Step 6: Final answer
    x = 106,625.21

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.