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Finding the Fourth Proportional to 64,672.80, 96,937.20 and 31,408.80

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Solution

The fourth proportional to 64,672.80, 96,937.20 and 31,408.80 is: 47,078.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    64,672.80 : 96,937.20 = 31,408.80 : x
  2. Step 2: Convert to fraction form
    64,672.80/96,937.20 = 31,408.80/x
  3. Step 3: Cross multiply
    64,672.80x = 96,937.20 × 31,408.80
  4. Step 4: Simplify right side
    64,672.80x = 3,044,681,127.36
  5. Step 5: Solve for x
    x = 3,044,681,127.36/64,672.80
  6. Step 6: Final answer
    x = 47,078.23

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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.