Home / 199,687.20-275,412.56-128,072.68

Finding the Fourth Proportional to 199,687.20, 275,412.56 and 128,072.68

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Solution

The fourth proportional to 199,687.20, 275,412.56 and 128,072.68 is: 176,640.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    199,687.20 : 275,412.56 = 128,072.68 : x
  2. Step 2: Convert to fraction form
    199,687.20/275,412.56 = 128,072.68/x
  3. Step 3: Cross multiply
    199,687.20x = 275,412.56 × 128,072.68
  4. Step 4: Simplify right side
    199,687.20x = 35,272,824,664.86
  5. Step 5: Solve for x
    x = 35,272,824,664.86/199,687.20
  6. Step 6: Final answer
    x = 176,640.39

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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.