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Finding the Fourth Proportional to 68,438.80, 94,438.74 and 38,219.32

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Solution

The fourth proportional to 68,438.80, 94,438.74 and 38,219.32 is: 52,738.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    68,438.80 : 94,438.74 = 38,219.32 : x
  2. Step 2: Convert to fraction form
    68,438.80/94,438.74 = 38,219.32/x
  3. Step 3: Cross multiply
    68,438.80x = 94,438.74 × 38,219.32
  4. Step 4: Simplify right side
    68,438.80x = 3,609,384,424.46
  5. Step 5: Solve for x
    x = 3,609,384,424.46/68,438.80
  6. Step 6: Final answer
    x = 52,738.86

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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.