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Finding the Fourth Proportional to 87,295.58, 120,362.21 and 67,920.12

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Solution

The fourth proportional to 87,295.58, 120,362.21 and 67,920.12 is: 93,647.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    87,295.58 : 120,362.21 = 67,920.12 : x
  2. Step 2: Convert to fraction form
    87,295.58/120,362.21 = 67,920.12/x
  3. Step 3: Cross multiply
    87,295.58x = 120,362.21 × 67,920.12
  4. Step 4: Simplify right side
    87,295.58x = 8,175,015,407.06
  5. Step 5: Solve for x
    x = 8,175,015,407.06/87,295.58
  6. Step 6: Final answer
    x = 93,647.53

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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.