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Finding the Fourth Proportional to 123,508.95, 170,443.08 and 66,920.37

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Solution

The fourth proportional to 123,508.95, 170,443.08 and 66,920.37 is: 92,350.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    123,508.95 : 170,443.08 = 66,920.37 : x
  2. Step 2: Convert to fraction form
    123,508.95/170,443.08 = 66,920.37/x
  3. Step 3: Cross multiply
    123,508.95x = 170,443.08 × 66,920.37
  4. Step 4: Simplify right side
    123,508.95x = 11,406,113,977.54
  5. Step 5: Solve for x
    x = 11,406,113,977.54/123,508.95
  6. Step 6: Final answer
    x = 92,350.51

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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.