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Finding the Fourth Proportional to 120,387.58, 166,140.24 and 65,943.58

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Solution

The fourth proportional to 120,387.58, 166,140.24 and 65,943.58 is: 91,005.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    120,387.58 : 166,140.24 = 65,943.58 : x
  2. Step 2: Convert to fraction form
    120,387.58/166,140.24 = 65,943.58/x
  3. Step 3: Cross multiply
    120,387.58x = 166,140.24 × 65,943.58
  4. Step 4: Simplify right side
    120,387.58x = 10,955,882,207.66
  5. Step 5: Solve for x
    x = 10,955,882,207.66/120,387.58
  6. Step 6: Final answer
    x = 91,005.09

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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.