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Finding the Fourth Proportional to 129,459.99, 178,348.48 and 123,480.97

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Solution

The fourth proportional to 129,459.99, 178,348.48 and 123,480.97 is: 170,111.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    129,459.99 : 178,348.48 = 123,480.97 : x
  2. Step 2: Convert to fraction form
    129,459.99/178,348.48 = 123,480.97/x
  3. Step 3: Cross multiply
    129,459.99x = 178,348.48 × 123,480.97
  4. Step 4: Simplify right side
    129,459.99x = 22,022,643,308.43
  5. Step 5: Solve for x
    x = 22,022,643,308.43/129,459.99
  6. Step 6: Final answer
    x = 170,111.58

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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.