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Finding the Fourth Proportional to 68,642.86, 94,728.95 and 38,428.05

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Solution

The fourth proportional to 68,642.86, 94,728.95 and 38,428.05 is: 53,031.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    68,642.86 : 94,728.95 = 38,428.05 : x
  2. Step 2: Convert to fraction form
    68,642.86/94,728.95 = 38,428.05/x
  3. Step 3: Cross multiply
    68,642.86x = 94,728.95 × 38,428.05
  4. Step 4: Simplify right side
    68,642.86x = 3,640,248,827.05
  5. Step 5: Solve for x
    x = 3,640,248,827.05/68,642.86
  6. Step 6: Final answer
    x = 53,031.72

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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.