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Finding the Fourth Proportional to 90,609.66, 135,930.29 and 34,454.59

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Solution

The fourth proportional to 90,609.66, 135,930.29 and 34,454.59 is: 51,687.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    90,609.66 : 135,930.29 = 34,454.59 : x
  2. Step 2: Convert to fraction form
    90,609.66/135,930.29 = 34,454.59/x
  3. Step 3: Cross multiply
    90,609.66x = 135,930.29 × 34,454.59
  4. Step 4: Simplify right side
    90,609.66x = 4,683,421,898.43
  5. Step 5: Solve for x
    x = 4,683,421,898.43/90,609.66
  6. Step 6: Final answer
    x = 51,687.89

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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.