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Finding the Fourth Proportional to 88,725.20, 133,087.80 and 79,977.20

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Solution

The fourth proportional to 88,725.20, 133,087.80 and 79,977.20 is: 119,965.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    88,725.20 : 133,087.80 = 79,977.20 : x
  2. Step 2: Convert to fraction form
    88,725.20/133,087.80 = 79,977.20/x
  3. Step 3: Cross multiply
    88,725.20x = 133,087.80 × 79,977.20
  4. Step 4: Simplify right side
    88,725.20x = 10,643,989,598.16
  5. Step 5: Solve for x
    x = 10,643,989,598.16/88,725.20
  6. Step 6: Final answer
    x = 119,965.80

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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.