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Finding the Fourth Proportional to 68,138.50, 94,032.57 and 38,330.50

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Solution

The fourth proportional to 68,138.50, 94,032.57 and 38,330.50 is: 52,896.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    68,138.50 : 94,032.57 = 38,330.50 : x
  2. Step 2: Convert to fraction form
    68,138.50/94,032.57 = 38,330.50/x
  3. Step 3: Cross multiply
    68,138.50x = 94,032.57 × 38,330.50
  4. Step 4: Simplify right side
    68,138.50x = 3,604,315,424.39
  5. Step 5: Solve for x
    x = 3,604,315,424.39/68,138.50
  6. Step 6: Final answer
    x = 52,896.90

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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.