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Finding the Fourth Proportional to 123,509.57, 170,443.25 and 66,920.95

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Solution

The fourth proportional to 123,509.57, 170,443.25 and 66,920.95 is: 92,350.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    123,509.57 : 170,443.25 = 66,920.95 : x
  2. Step 2: Convert to fraction form
    123,509.57/170,443.25 = 66,920.95/x
  3. Step 3: Cross multiply
    123,509.57x = 170,443.25 × 66,920.95
  4. Step 4: Simplify right side
    123,509.57x = 11,406,224,211.09
  5. Step 5: Solve for x
    x = 11,406,224,211.09/123,509.57
  6. Step 6: Final answer
    x = 92,350.93

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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.