Home / 221,012.57-331,331.45-78,815.05

Finding the Fourth Proportional to 221,012.57, 331,331.45 and 78,815.05

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Solution

The fourth proportional to 221,012.57, 331,331.45 and 78,815.05 is: 118,155.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    221,012.57 : 331,331.45 = 78,815.05 : x
  2. Step 2: Convert to fraction form
    221,012.57/331,331.45 = 78,815.05/x
  3. Step 3: Cross multiply
    221,012.57x = 331,331.45 × 78,815.05
  4. Step 4: Simplify right side
    221,012.57x = 26,113,903,575.92
  5. Step 5: Solve for x
    x = 26,113,903,575.92/221,012.57
  6. Step 6: Final answer
    x = 118,155.74

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.