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Finding the Fourth Proportional to 90,794.56, 136,209.12 and 28,448.32

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Solution

The fourth proportional to 90,794.56, 136,209.12 and 28,448.32 is: 42,677.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    90,794.56 : 136,209.12 = 28,448.32 : x
  2. Step 2: Convert to fraction form
    90,794.56/136,209.12 = 28,448.32/x
  3. Step 3: Cross multiply
    90,794.56x = 136,209.12 × 28,448.32
  4. Step 4: Simplify right side
    90,794.56x = 3,874,920,632.68
  5. Step 5: Solve for x
    x = 3,874,920,632.68/90,794.56
  6. Step 6: Final answer
    x = 42,677.89

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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.