Home / 120,631.22-166,477.65-78,226.10

Finding the Fourth Proportional to 120,631.22, 166,477.65 and 78,226.10

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Solution

The fourth proportional to 120,631.22, 166,477.65 and 78,226.10 is: 107,956.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    120,631.22 : 166,477.65 = 78,226.10 : x
  2. Step 2: Convert to fraction form
    120,631.22/166,477.65 = 78,226.10/x
  3. Step 3: Cross multiply
    120,631.22x = 166,477.65 × 78,226.10
  4. Step 4: Simplify right side
    120,631.22x = 13,022,897,296.67
  5. Step 5: Solve for x
    x = 13,022,897,296.67/120,631.22
  6. Step 6: Final answer
    x = 107,956.28

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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.