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Finding the Fourth Proportional to 51,287.80, 76,931.70 and 27,902.20

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Solution

The fourth proportional to 51,287.80, 76,931.70 and 27,902.20 is: 41,853.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    51,287.80 : 76,931.70 = 27,902.20 : x
  2. Step 2: Convert to fraction form
    51,287.80/76,931.70 = 27,902.20/x
  3. Step 3: Cross multiply
    51,287.80x = 76,931.70 × 27,902.20
  4. Step 4: Simplify right side
    51,287.80x = 2,146,563,679.74
  5. Step 5: Solve for x
    x = 2,146,563,679.74/51,287.80
  6. Step 6: Final answer
    x = 41,853.30

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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.