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Finding the Fourth Proportional to 90,585.75, 135,730.65 and 55,057.93

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Solution

The fourth proportional to 90,585.75, 135,730.65 and 55,057.93 is: 82,496.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    90,585.75 : 135,730.65 = 55,057.93 : x
  2. Step 2: Convert to fraction form
    90,585.75/135,730.65 = 55,057.93/x
  3. Step 3: Cross multiply
    90,585.75x = 135,730.65 × 55,057.93
  4. Step 4: Simplify right side
    90,585.75x = 7,473,048,626.55
  5. Step 5: Solve for x
    x = 7,473,048,626.55/90,585.75
  6. Step 6: Final answer
    x = 82,496.96

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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.