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Finding the Fourth Proportional to 154,310.59, 212,943.72 and 86,328.75

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Solution

The fourth proportional to 154,310.59, 212,943.72 and 86,328.75 is: 119,130.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    154,310.59 : 212,943.72 = 86,328.75 : x
  2. Step 2: Convert to fraction form
    154,310.59/212,943.72 = 86,328.75/x
  3. Step 3: Cross multiply
    154,310.59x = 212,943.72 × 86,328.75
  4. Step 4: Simplify right side
    154,310.59x = 18,383,165,167.95
  5. Step 5: Solve for x
    x = 18,383,165,167.95/154,310.59
  6. Step 6: Final answer
    x = 119,130.94

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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.