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Finding the Fourth Proportional to 70,234.60, 105,330.30 and 20,319.40

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Solution

The fourth proportional to 70,234.60, 105,330.30 and 20,319.40 is: 30,472.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    70,234.60 : 105,330.30 = 20,319.40 : x
  2. Step 2: Convert to fraction form
    70,234.60/105,330.30 = 20,319.40/x
  3. Step 3: Cross multiply
    70,234.60x = 105,330.30 × 20,319.40
  4. Step 4: Simplify right side
    70,234.60x = 2,140,248,497.82
  5. Step 5: Solve for x
    x = 2,140,248,497.82/70,234.60
  6. Step 6: Final answer
    x = 30,472.85

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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.