Home / 129,010.51-178,034.94-71,649.97

Finding the Fourth Proportional to 129,010.51, 178,034.94 and 71,649.97

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Solution

The fourth proportional to 129,010.51, 178,034.94 and 71,649.97 is: 98,877.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    129,010.51 : 178,034.94 = 71,649.97 : x
  2. Step 2: Convert to fraction form
    129,010.51/178,034.94 = 71,649.97/x
  3. Step 3: Cross multiply
    129,010.51x = 178,034.94 × 71,649.97
  4. Step 4: Simplify right side
    129,010.51x = 12,756,198,109.95
  5. Step 5: Solve for x
    x = 12,756,198,109.95/129,010.51
  6. Step 6: Final answer
    x = 98,877.20

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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.