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Finding the Fourth Proportional to 252,129.80, 378,194.70 and 141,307.40

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Solution

The fourth proportional to 252,129.80, 378,194.70 and 141,307.40 is: 211,961.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    252,129.80 : 378,194.70 = 141,307.40 : x
  2. Step 2: Convert to fraction form
    252,129.80/378,194.70 = 141,307.40/x
  3. Step 3: Cross multiply
    252,129.80x = 378,194.70 × 141,307.40
  4. Step 4: Simplify right side
    252,129.80x = 53,441,709,750.78
  5. Step 5: Solve for x
    x = 53,441,709,750.78/252,129.80
  6. Step 6: Final answer
    x = 211,961.10

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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.