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Finding the Fourth Proportional to 90,636.48, 135,974.16 and 38,015.64

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Solution

The fourth proportional to 90,636.48, 135,974.16 and 38,015.64 is: 57,031.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    90,636.48 : 135,974.16 = 38,015.64 : x
  2. Step 2: Convert to fraction form
    90,636.48/135,974.16 = 38,015.64/x
  3. Step 3: Cross multiply
    90,636.48x = 135,974.16 × 38,015.64
  4. Step 4: Simplify right side
    90,636.48x = 5,169,144,715.86
  5. Step 5: Solve for x
    x = 5,169,144,715.86/90,636.48
  6. Step 6: Final answer
    x = 57,031.61

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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.