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Finding the Fourth Proportional to 68,420.61, 94,412.12 and 38,207.61

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Solution

The fourth proportional to 68,420.61, 94,412.12 and 38,207.61 is: 52,721.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    68,420.61 : 94,412.12 = 38,207.61 : x
  2. Step 2: Convert to fraction form
    68,420.61/94,412.12 = 38,207.61/x
  3. Step 3: Cross multiply
    68,420.61x = 94,412.12 × 38,207.61
  4. Step 4: Simplify right side
    68,420.61x = 3,607,261,269.20
  5. Step 5: Solve for x
    x = 3,607,261,269.20/68,420.61
  6. Step 6: Final answer
    x = 52,721.85

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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.