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Finding the Fourth Proportional to 123,565.69, 170,520.72 and 66,977.06

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Solution

The fourth proportional to 123,565.69, 170,520.72 and 66,977.06 is: 92,428.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    123,565.69 : 170,520.72 = 66,977.06 : x
  2. Step 2: Convert to fraction form
    123,565.69/170,520.72 = 66,977.06/x
  3. Step 3: Cross multiply
    123,565.69x = 170,520.72 × 66,977.06
  4. Step 4: Simplify right side
    123,565.69x = 11,420,976,494.68
  5. Step 5: Solve for x
    x = 11,420,976,494.68/123,565.69
  6. Step 6: Final answer
    x = 92,428.38

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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.