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Finding the Fourth Proportional to 154,274.15, 212,918.03 and 86,294.90

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Solution

The fourth proportional to 154,274.15, 212,918.03 and 86,294.90 is: 119,097.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    154,274.15 : 212,918.03 = 86,294.90 : x
  2. Step 2: Convert to fraction form
    154,274.15/212,918.03 = 86,294.90/x
  3. Step 3: Cross multiply
    154,274.15x = 212,918.03 × 86,294.90
  4. Step 4: Simplify right side
    154,274.15x = 18,373,740,107.05
  5. Step 5: Solve for x
    x = 18,373,740,107.05/154,274.15
  6. Step 6: Final answer
    x = 119,097.98

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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.