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Finding the Fourth Proportional to 68,719.95, 103,548.09 and 56,513.43

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Solution

The fourth proportional to 68,719.95, 103,548.09 and 56,513.43 is: 85,155.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    68,719.95 : 103,548.09 = 56,513.43 : x
  2. Step 2: Convert to fraction form
    68,719.95/103,548.09 = 56,513.43/x
  3. Step 3: Cross multiply
    68,719.95x = 103,548.09 × 56,513.43
  4. Step 4: Simplify right side
    68,719.95x = 5,851,857,735.85
  5. Step 5: Solve for x
    x = 5,851,857,735.85/68,719.95
  6. Step 6: Final answer
    x = 85,155.15

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.51) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.