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Finding the Fourth Proportional to 154,072.98, 212,622.12 and 90,411.84

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Solution

The fourth proportional to 154,072.98, 212,622.12 and 90,411.84 is: 124,769.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    154,072.98 : 212,622.12 = 90,411.84 : x
  2. Step 2: Convert to fraction form
    154,072.98/212,622.12 = 90,411.84/x
  3. Step 3: Cross multiply
    154,072.98x = 212,622.12 × 90,411.84
  4. Step 4: Simplify right side
    154,072.98x = 19,223,557,093.90
  5. Step 5: Solve for x
    x = 19,223,557,093.90/154,072.98
  6. Step 6: Final answer
    x = 124,769.17

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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.