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Finding the Fourth Proportional to 120,358.80, 166,093.20 and 66,643.65

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Solution

The fourth proportional to 120,358.80, 166,093.20 and 66,643.65 is: 91,967.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    120,358.80 : 166,093.20 = 66,643.65 : x
  2. Step 2: Convert to fraction form
    120,358.80/166,093.20 = 66,643.65/x
  3. Step 3: Cross multiply
    120,358.80x = 166,093.20 × 66,643.65
  4. Step 4: Simplify right side
    120,358.80x = 11,069,057,088.18
  5. Step 5: Solve for x
    x = 11,069,057,088.18/120,358.80
  6. Step 6: Final answer
    x = 91,967.16

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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.