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Finding the Fourth Proportional to 77,278.61, 107,190.06 and 75,230.12

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Solution

The fourth proportional to 77,278.61, 107,190.06 and 75,230.12 is: 104,348.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    77,278.61 : 107,190.06 = 75,230.12 : x
  2. Step 2: Convert to fraction form
    77,278.61/107,190.06 = 75,230.12/x
  3. Step 3: Cross multiply
    77,278.61x = 107,190.06 × 75,230.12
  4. Step 4: Simplify right side
    77,278.61x = 8,063,920,540.66
  5. Step 5: Solve for x
    x = 8,063,920,540.66/77,278.61
  6. Step 6: Final answer
    x = 104,348.68

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.39) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.