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Finding the Fourth Proportional to 123,220.78, 170,037.60 and 69,502.60

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Solution

The fourth proportional to 123,220.78, 170,037.60 and 69,502.60 is: 95,909.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    123,220.78 : 170,037.60 = 69,502.60 : x
  2. Step 2: Convert to fraction form
    123,220.78/170,037.60 = 69,502.60/x
  3. Step 3: Cross multiply
    123,220.78x = 170,037.60 × 69,502.60
  4. Step 4: Simplify right side
    123,220.78x = 11,818,055,297.76
  5. Step 5: Solve for x
    x = 11,818,055,297.76/123,220.78
  6. Step 6: Final answer
    x = 95,909.60

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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.