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Finding the Fourth Proportional to 123,289, 170,140.05 and 66,701.59

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Solution

The fourth proportional to 123,289, 170,140.05 and 66,701.59 is: 92,048.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    123,289 : 170,140.05 = 66,701.59 : x
  2. Step 2: Convert to fraction form
    123,289/170,140.05 = 66,701.59/x
  3. Step 3: Cross multiply
    123,289x = 170,140.05 × 66,701.59
  4. Step 4: Simplify right side
    123,289x = 11,348,611,857.68
  5. Step 5: Solve for x
    x = 11,348,611,857.68/123,289
  6. Step 6: Final answer
    x = 92,048.86

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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.