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Finding the Fourth Proportional to 123,446.72, 170,356.71 and 66,858.11

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Solution

The fourth proportional to 123,446.72, 170,356.71 and 66,858.11 is: 92,264.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    123,446.72 : 170,356.71 = 66,858.11 : x
  2. Step 2: Convert to fraction form
    123,446.72/170,356.71 = 66,858.11/x
  3. Step 3: Cross multiply
    123,446.72x = 170,356.71 × 66,858.11
  4. Step 4: Simplify right side
    123,446.72x = 11,389,727,656.42
  5. Step 5: Solve for x
    x = 11,389,727,656.42/123,446.72
  6. Step 6: Final answer
    x = 92,264.32

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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.