Home / 197,131.04-272,161.37-128,286.10

Finding the Fourth Proportional to 197,131.04, 272,161.37 and 128,286.10

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Solution

The fourth proportional to 197,131.04, 272,161.37 and 128,286.10 is: 177,113.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    197,131.04 : 272,161.37 = 128,286.10 : x
  2. Step 2: Convert to fraction form
    197,131.04/272,161.37 = 128,286.10/x
  3. Step 3: Cross multiply
    197,131.04x = 272,161.37 × 128,286.10
  4. Step 4: Simplify right side
    197,131.04x = 34,914,518,725.72
  5. Step 5: Solve for x
    x = 34,914,518,725.72/197,131.04
  6. Step 6: Final answer
    x = 177,113.25

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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.