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Finding the Fourth Proportional to 77,781.89, 107,113.11 and 67,568.25

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Solution

The fourth proportional to 77,781.89, 107,113.11 and 67,568.25 is: 93,047.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    77,781.89 : 107,113.11 = 67,568.25 : x
  2. Step 2: Convert to fraction form
    77,781.89/107,113.11 = 67,568.25/x
  3. Step 3: Cross multiply
    77,781.89x = 107,113.11 × 67,568.25
  4. Step 4: Simplify right side
    77,781.89x = 7,237,445,394.76
  5. Step 5: Solve for x
    x = 7,237,445,394.76/77,781.89
  6. Step 6: Final answer
    x = 93,047.96

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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.