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Finding the Fourth Proportional to 90,908.96, 136,152 and 87,755.42

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Solution

The fourth proportional to 90,908.96, 136,152 and 87,755.42 is: 131,429.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    90,908.96 : 136,152 = 87,755.42 : x
  2. Step 2: Convert to fraction form
    90,908.96/136,152 = 87,755.42/x
  3. Step 3: Cross multiply
    90,908.96x = 136,152 × 87,755.42
  4. Step 4: Simplify right side
    90,908.96x = 11,948,075,943.84
  5. Step 5: Solve for x
    x = 11,948,075,943.84/90,908.96
  6. Step 6: Final answer
    x = 131,429.02

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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.