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Finding the Fourth Proportional to 70,366.70, 105,555.52 and 20,447.51

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Solution

The fourth proportional to 70,366.70, 105,555.52 and 20,447.51 is: 30,672.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    70,366.70 : 105,555.52 = 20,447.51 : x
  2. Step 2: Convert to fraction form
    70,366.70/105,555.52 = 20,447.51/x
  3. Step 3: Cross multiply
    70,366.70x = 105,555.52 × 20,447.51
  4. Step 4: Simplify right side
    70,366.70x = 2,158,347,550.76
  5. Step 5: Solve for x
    x = 2,158,347,550.76/70,366.70
  6. Step 6: Final answer
    x = 30,672.85

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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.