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Finding the Fourth Proportional to 68,420.52, 94,420.14 and 38,205.60

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Solution

The fourth proportional to 68,420.52, 94,420.14 and 38,205.60 is: 52,723.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    68,420.52 : 94,420.14 = 38,205.60 : x
  2. Step 2: Convert to fraction form
    68,420.52/94,420.14 = 38,205.60/x
  3. Step 3: Cross multiply
    68,420.52x = 94,420.14 × 38,205.60
  4. Step 4: Simplify right side
    68,420.52x = 3,607,378,100.78
  5. Step 5: Solve for x
    x = 3,607,378,100.78/68,420.52
  6. Step 6: Final answer
    x = 52,723.63

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.