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Finding the Fourth Proportional to 126,039.40, 189,059.10 and 70,052.20

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Solution

The fourth proportional to 126,039.40, 189,059.10 and 70,052.20 is: 105,078.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    126,039.40 : 189,059.10 = 70,052.20 : x
  2. Step 2: Convert to fraction form
    126,039.40/189,059.10 = 70,052.20/x
  3. Step 3: Cross multiply
    126,039.40x = 189,059.10 × 70,052.20
  4. Step 4: Simplify right side
    126,039.40x = 13,244,005,885.02
  5. Step 5: Solve for x
    x = 13,244,005,885.02/126,039.40
  6. Step 6: Final answer
    x = 105,078.30

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1.5x scale

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.