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Finding the Fourth Proportional to 51,798.56, 77,718.48 and 20,655.68

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Solution

The fourth proportional to 51,798.56, 77,718.48 and 20,655.68 is: 30,991.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    51,798.56 : 77,718.48 = 20,655.68 : x
  2. Step 2: Convert to fraction form
    51,798.56/77,718.48 = 20,655.68/x
  3. Step 3: Cross multiply
    51,798.56x = 77,718.48 × 20,655.68
  4. Step 4: Simplify right side
    51,798.56x = 1,605,328,052.97
  5. Step 5: Solve for x
    x = 1,605,328,052.97/51,798.56
  6. Step 6: Final answer
    x = 30,991.75

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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.