Home / 70,158.12-105,236.38-20,236.57

Finding the Fourth Proportional to 70,158.12, 105,236.38 and 20,236.57

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Solution

The fourth proportional to 70,158.12, 105,236.38 and 20,236.57 is: 30,354.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    70,158.12 : 105,236.38 = 20,236.57 : x
  2. Step 2: Convert to fraction form
    70,158.12/105,236.38 = 20,236.57/x
  3. Step 3: Cross multiply
    70,158.12x = 105,236.38 × 20,236.57
  4. Step 4: Simplify right side
    70,158.12x = 2,129,623,370.42
  5. Step 5: Solve for x
    x = 2,129,623,370.42/70,158.12
  6. Step 6: Final answer
    x = 30,354.62

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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.