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Finding the Fourth Proportional to 99,229.85, 136,936.65 and 53,907.47

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Solution

The fourth proportional to 99,229.85, 136,936.65 and 53,907.47 is: 74,392.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    99,229.85 : 136,936.65 = 53,907.47 : x
  2. Step 2: Convert to fraction form
    99,229.85/136,936.65 = 53,907.47/x
  3. Step 3: Cross multiply
    99,229.85x = 136,936.65 × 53,907.47
  4. Step 4: Simplify right side
    99,229.85x = 7,381,908,351.78
  5. Step 5: Solve for x
    x = 7,381,908,351.78/99,229.85
  6. Step 6: Final answer
    x = 74,392.01

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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.