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Finding the Fourth Proportional to 123,855.90, 170,921.08 and 70,140.90

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Solution

The fourth proportional to 123,855.90, 170,921.08 and 70,140.90 is: 96,794.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    123,855.90 : 170,921.08 = 70,140.90 : x
  2. Step 2: Convert to fraction form
    123,855.90/170,921.08 = 70,140.90/x
  3. Step 3: Cross multiply
    123,855.90x = 170,921.08 × 70,140.90
  4. Step 4: Simplify right side
    123,855.90x = 11,988,558,380.17
  5. Step 5: Solve for x
    x = 11,988,558,380.17/123,855.90
  6. Step 6: Final answer
    x = 96,794.41

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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.