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Finding the Fourth Proportional to 123,376.95, 170,260.20 and 66,788.31

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Solution

The fourth proportional to 123,376.95, 170,260.20 and 66,788.31 is: 92,167.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    123,376.95 : 170,260.20 = 66,788.31 : x
  2. Step 2: Convert to fraction form
    123,376.95/170,260.20 = 66,788.31/x
  3. Step 3: Cross multiply
    123,376.95x = 170,260.20 × 66,788.31
  4. Step 4: Simplify right side
    123,376.95x = 11,371,391,018.26
  5. Step 5: Solve for x
    x = 11,371,391,018.26/123,376.95
  6. Step 6: Final answer
    x = 92,167.87

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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.