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Finding the Fourth Proportional to 252,013.70, 378,020.55 and 85,801.70

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Solution

The fourth proportional to 252,013.70, 378,020.55 and 85,801.70 is: 128,702.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    252,013.70 : 378,020.55 = 85,801.70 : x
  2. Step 2: Convert to fraction form
    252,013.70/378,020.55 = 85,801.70/x
  3. Step 3: Cross multiply
    252,013.70x = 378,020.55 × 85,801.70
  4. Step 4: Simplify right side
    252,013.70x = 32,434,805,824.94
  5. Step 5: Solve for x
    x = 32,434,805,824.94/252,013.70
  6. Step 6: Final answer
    x = 128,702.55

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1.5x scale

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.