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Finding the Fourth Proportional to 123,457, 170,370.68 and 66,868.80

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Solution

The fourth proportional to 123,457, 170,370.68 and 66,868.80 is: 92,278.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    123,457 : 170,370.68 = 66,868.80 : x
  2. Step 2: Convert to fraction form
    123,457/170,370.68 = 66,868.80/x
  3. Step 3: Cross multiply
    123,457x = 170,370.68 × 66,868.80
  4. Step 4: Simplify right side
    123,457x = 11,392,482,926.78
  5. Step 5: Solve for x
    x = 11,392,482,926.78/123,457
  6. Step 6: Final answer
    x = 92,278.95

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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.