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Finding the Fourth Proportional to 75,994.76, 104,959.86 and 61,920.20

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Solution

The fourth proportional to 75,994.76, 104,959.86 and 61,920.20 is: 85,520.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    75,994.76 : 104,959.86 = 61,920.20 : x
  2. Step 2: Convert to fraction form
    75,994.76/104,959.86 = 61,920.20/x
  3. Step 3: Cross multiply
    75,994.76x = 104,959.86 × 61,920.20
  4. Step 4: Simplify right side
    75,994.76x = 6,499,135,523.17
  5. Step 5: Solve for x
    x = 6,499,135,523.17/75,994.76
  6. Step 6: Final answer
    x = 85,520.84

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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.