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Finding the Fourth Proportional to 90,569.70, 135,770.64 and 34,392.96

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Solution

The fourth proportional to 90,569.70, 135,770.64 and 34,392.96 is: 51,557.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    90,569.70 : 135,770.64 = 34,392.96 : x
  2. Step 2: Convert to fraction form
    90,569.70/135,770.64 = 34,392.96/x
  3. Step 3: Cross multiply
    90,569.70x = 135,770.64 × 34,392.96
  4. Step 4: Simplify right side
    90,569.70x = 4,669,554,190.69
  5. Step 5: Solve for x
    x = 4,669,554,190.69/90,569.70
  6. Step 6: Final answer
    x = 51,557.58

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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.