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Finding the Fourth Proportional to 51,347.20, 77,020.80 and 40,979.20

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Solution

The fourth proportional to 51,347.20, 77,020.80 and 40,979.20 is: 61,468.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    51,347.20 : 77,020.80 = 40,979.20 : x
  2. Step 2: Convert to fraction form
    51,347.20/77,020.80 = 40,979.20/x
  3. Step 3: Cross multiply
    51,347.20x = 77,020.80 × 40,979.20
  4. Step 4: Simplify right side
    51,347.20x = 3,156,250,767.36
  5. Step 5: Solve for x
    x = 3,156,250,767.36/51,347.20
  6. Step 6: Final answer
    x = 61,468.80

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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.