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Finding the Fourth Proportional to 68,890.76, 95,061.90 and 38,679.40

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Solution

The fourth proportional to 68,890.76, 95,061.90 and 38,679.40 is: 53,373.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    68,890.76 : 95,061.90 = 38,679.40 : x
  2. Step 2: Convert to fraction form
    68,890.76/95,061.90 = 38,679.40/x
  3. Step 3: Cross multiply
    68,890.76x = 95,061.90 × 38,679.40
  4. Step 4: Simplify right side
    68,890.76x = 3,676,937,540.86
  5. Step 5: Solve for x
    x = 3,676,937,540.86/68,890.76
  6. Step 6: Final answer
    x = 53,373.45

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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.