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Finding the Fourth Proportional to 51,408.80, 77,127.60 and 21,840.80

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Solution

The fourth proportional to 51,408.80, 77,127.60 and 21,840.80 is: 32,767.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    51,408.80 : 77,127.60 = 21,840.80 : x
  2. Step 2: Convert to fraction form
    51,408.80/77,127.60 = 21,840.80/x
  3. Step 3: Cross multiply
    51,408.80x = 77,127.60 × 21,840.80
  4. Step 4: Simplify right side
    51,408.80x = 1,684,528,486.08
  5. Step 5: Solve for x
    x = 1,684,528,486.08/51,408.80
  6. Step 6: Final answer
    x = 32,767.32

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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.