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Finding the Fourth Proportional to 70,230.65, 105,330.17 and 20,299.61

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Solution

The fourth proportional to 70,230.65, 105,330.17 and 20,299.61 is: 30,444.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    70,230.65 : 105,330.17 = 20,299.61 : x
  2. Step 2: Convert to fraction form
    70,230.65/105,330.17 = 20,299.61/x
  3. Step 3: Cross multiply
    70,230.65x = 105,330.17 × 20,299.61
  4. Step 4: Simplify right side
    70,230.65x = 2,138,161,686.31
  5. Step 5: Solve for x
    x = 2,138,161,686.31/70,230.65
  6. Step 6: Final answer
    x = 30,444.85

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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.