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Finding the Fourth Proportional to 123,240.60, 170,071.20 and 66,651.84

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Solution

The fourth proportional to 123,240.60, 170,071.20 and 66,651.84 is: 91,979.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    123,240.60 : 170,071.20 = 66,651.84 : x
  2. Step 2: Convert to fraction form
    123,240.60/170,071.20 = 66,651.84/x
  3. Step 3: Cross multiply
    123,240.60x = 170,071.20 × 66,651.84
  4. Step 4: Simplify right side
    123,240.60x = 11,335,558,411.01
  5. Step 5: Solve for x
    x = 11,335,558,411.01/123,240.60
  6. Step 6: Final answer
    x = 91,979.09

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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.