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Finding the Fourth Proportional to 51,988.80, 77,983.20 and 51,211.20

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Solution

The fourth proportional to 51,988.80, 77,983.20 and 51,211.20 is: 76,816.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    51,988.80 : 77,983.20 = 51,211.20 : x
  2. Step 2: Convert to fraction form
    51,988.80/77,983.20 = 51,211.20/x
  3. Step 3: Cross multiply
    51,988.80x = 77,983.20 × 51,211.20
  4. Step 4: Simplify right side
    51,988.80x = 3,993,613,251.84
  5. Step 5: Solve for x
    x = 3,993,613,251.84/51,988.80
  6. Step 6: Final answer
    x = 76,816.80

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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.