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Finding the Fourth Proportional to 68,684.88, 94,778.76 and 38,876.88

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Solution

The fourth proportional to 68,684.88, 94,778.76 and 38,876.88 is: 53,646.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    68,684.88 : 94,778.76 = 38,876.88 : x
  2. Step 2: Convert to fraction form
    68,684.88/94,778.76 = 38,876.88/x
  3. Step 3: Cross multiply
    68,684.88x = 94,778.76 × 38,876.88
  4. Step 4: Simplify right side
    68,684.88x = 3,684,702,479.07
  5. Step 5: Solve for x
    x = 3,684,702,479.07/68,684.88
  6. Step 6: Final answer
    x = 53,646.49

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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.