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Finding the Fourth Proportional to 154,380.87, 212,977.98 and 90,689.94

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Solution

The fourth proportional to 154,380.87, 212,977.98 and 90,689.94 is: 125,112.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    154,380.87 : 212,977.98 = 90,689.94 : x
  2. Step 2: Convert to fraction form
    154,380.87/212,977.98 = 90,689.94/x
  3. Step 3: Cross multiply
    154,380.87x = 212,977.98 × 90,689.94
  4. Step 4: Simplify right side
    154,380.87x = 19,314,960,227.52
  5. Step 5: Solve for x
    x = 19,314,960,227.52/154,380.87
  6. Step 6: Final answer
    x = 125,112.39

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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.