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Finding the Fourth Proportional to 68,640.56, 94,718.74 and 38,418.96

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Solution

The fourth proportional to 68,640.56, 94,718.74 and 38,418.96 is: 53,015.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    68,640.56 : 94,718.74 = 38,418.96 : x
  2. Step 2: Convert to fraction form
    68,640.56/94,718.74 = 38,418.96/x
  3. Step 3: Cross multiply
    68,640.56x = 94,718.74 × 38,418.96
  4. Step 4: Simplify right side
    68,640.56x = 3,638,995,483.31
  5. Step 5: Solve for x
    x = 3,638,995,483.31/68,640.56
  6. Step 6: Final answer
    x = 53,015.24

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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.