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Finding the Fourth Proportional to 68,637, 94,720.66 and 38,421.56

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Solution

The fourth proportional to 68,637, 94,720.66 and 38,421.56 is: 53,022.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    68,637 : 94,720.66 = 38,421.56 : x
  2. Step 2: Convert to fraction form
    68,637/94,720.66 = 38,421.56/x
  3. Step 3: Cross multiply
    68,637x = 94,720.66 × 38,421.56
  4. Step 4: Simplify right side
    68,637x = 3,639,315,521.43
  5. Step 5: Solve for x
    x = 3,639,315,521.43/68,637
  6. Step 6: Final answer
    x = 53,022.65

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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.