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Finding the Fourth Proportional to 90,586.91, 135,270.35 and 73,979.89

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Solution

The fourth proportional to 90,586.91, 135,270.35 and 73,979.89 is: 110,471.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    90,586.91 : 135,270.35 = 73,979.89 : x
  2. Step 2: Convert to fraction form
    90,586.91/135,270.35 = 73,979.89/x
  3. Step 3: Cross multiply
    90,586.91x = 135,270.35 × 73,979.89
  4. Step 4: Simplify right side
    90,586.91x = 10,007,285,613.26
  5. Step 5: Solve for x
    x = 10,007,285,613.26/90,586.91
  6. Step 6: Final answer
    x = 110,471.65

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.