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Finding the Fourth Proportional to 135,904.20, 203,856.30 and 123,438.30

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Solution

The fourth proportional to 135,904.20, 203,856.30 and 123,438.30 is: 185,157.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    135,904.20 : 203,856.30 = 123,438.30 : x
  2. Step 2: Convert to fraction form
    135,904.20/203,856.30 = 123,438.30/x
  3. Step 3: Cross multiply
    135,904.20x = 203,856.30 × 123,438.30
  4. Step 4: Simplify right side
    135,904.20x = 25,163,675,116.29
  5. Step 5: Solve for x
    x = 25,163,675,116.29/135,904.20
  6. Step 6: Final answer
    x = 185,157.45

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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.