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Finding the Fourth Proportional to 70,887.80, 106,331.70 and 68,166.20

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Solution

The fourth proportional to 70,887.80, 106,331.70 and 68,166.20 is: 102,249.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    70,887.80 : 106,331.70 = 68,166.20 : x
  2. Step 2: Convert to fraction form
    70,887.80/106,331.70 = 68,166.20/x
  3. Step 3: Cross multiply
    70,887.80x = 106,331.70 × 68,166.20
  4. Step 4: Simplify right side
    70,887.80x = 7,248,227,928.54
  5. Step 5: Solve for x
    x = 7,248,227,928.54/70,887.80
  6. Step 6: Final answer
    x = 102,249.30

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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.