Home / 120,618.81-166,439.68-66,890.70

Finding the Fourth Proportional to 120,618.81, 166,439.68 and 66,890.70

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Solution

The fourth proportional to 120,618.81, 166,439.68 and 66,890.70 is: 92,301.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    120,618.81 : 166,439.68 = 66,890.70 : x
  2. Step 2: Convert to fraction form
    120,618.81/166,439.68 = 66,890.70/x
  3. Step 3: Cross multiply
    120,618.81x = 166,439.68 × 66,890.70
  4. Step 4: Simplify right side
    120,618.81x = 11,133,266,535.75
  5. Step 5: Solve for x
    x = 11,133,266,535.75/120,618.81
  6. Step 6: Final answer
    x = 92,301.25

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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.