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Finding the Fourth Proportional to 90,694.86, 136,088.37 and 40,764.90

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Solution

The fourth proportional to 90,694.86, 136,088.37 and 40,764.90 is: 61,168.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    90,694.86 : 136,088.37 = 40,764.90 : x
  2. Step 2: Convert to fraction form
    90,694.86/136,088.37 = 40,764.90/x
  3. Step 3: Cross multiply
    90,694.86x = 136,088.37 × 40,764.90
  4. Step 4: Simplify right side
    90,694.86x = 5,547,628,794.21
  5. Step 5: Solve for x
    x = 5,547,628,794.21/90,694.86
  6. Step 6: Final answer
    x = 61,168.06

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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.