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Finding the Fourth Proportional to 135,485.20, 203,234.20 and 42,056.40

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Solution

The fourth proportional to 135,485.20, 203,234.20 and 42,056.40 is: 63,086.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    135,485.20 : 203,234.20 = 42,056.40 : x
  2. Step 2: Convert to fraction form
    135,485.20/203,234.20 = 42,056.40/x
  3. Step 3: Cross multiply
    135,485.20x = 203,234.20 × 42,056.40
  4. Step 4: Simplify right side
    135,485.20x = 8,547,298,808.88
  5. Step 5: Solve for x
    x = 8,547,298,808.88/135,485.20
  6. Step 6: Final answer
    x = 63,086.59

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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.