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Finding the Fourth Proportional to 62,756.80, 94,135.20 and 21,203.20

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Solution

The fourth proportional to 62,756.80, 94,135.20 and 21,203.20 is: 31,804.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    62,756.80 : 94,135.20 = 21,203.20 : x
  2. Step 2: Convert to fraction form
    62,756.80/94,135.20 = 21,203.20/x
  3. Step 3: Cross multiply
    62,756.80x = 94,135.20 × 21,203.20
  4. Step 4: Simplify right side
    62,756.80x = 1,995,967,472.64
  5. Step 5: Solve for x
    x = 1,995,967,472.64/62,756.80
  6. Step 6: Final answer
    x = 31,804.80

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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.