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Finding the Fourth Proportional to 126,980.01, 189,542.81 and 117,729

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Solution

The fourth proportional to 126,980.01, 189,542.81 and 117,729 is: 175,733.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    126,980.01 : 189,542.81 = 117,729 : x
  2. Step 2: Convert to fraction form
    126,980.01/189,542.81 = 117,729/x
  3. Step 3: Cross multiply
    126,980.01x = 189,542.81 × 117,729
  4. Step 4: Simplify right side
    126,980.01x = 22,314,685,772.81
  5. Step 5: Solve for x
    x = 22,314,685,772.81/126,980.01
  6. Step 6: Final answer
    x = 175,733.85

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.