Home / 126,071.40-189,107.10-112,938.60

Finding the Fourth Proportional to 126,071.40, 189,107.10 and 112,938.60

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Solution

The fourth proportional to 126,071.40, 189,107.10 and 112,938.60 is: 169,407.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    126,071.40 : 189,107.10 = 112,938.60 : x
  2. Step 2: Convert to fraction form
    126,071.40/189,107.10 = 112,938.60/x
  3. Step 3: Cross multiply
    126,071.40x = 189,107.10 × 112,938.60
  4. Step 4: Simplify right side
    126,071.40x = 21,357,491,124.06
  5. Step 5: Solve for x
    x = 21,357,491,124.06/126,071.40
  6. Step 6: Final answer
    x = 169,407.90

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.