Home / 102,808.85-154,837.58-90,491.18

Finding the Fourth Proportional to 102,808.85, 154,837.58 and 90,491.18

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Solution

The fourth proportional to 102,808.85, 154,837.58 and 90,491.18 is: 136,286.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    102,808.85 : 154,837.58 = 90,491.18 : x
  2. Step 2: Convert to fraction form
    102,808.85/154,837.58 = 90,491.18/x
  3. Step 3: Cross multiply
    102,808.85x = 154,837.58 × 90,491.18
  4. Step 4: Simplify right side
    102,808.85x = 14,011,434,095.90
  5. Step 5: Solve for x
    x = 14,011,434,095.90/102,808.85
  6. Step 6: Final answer
    x = 136,286.27

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Why These Related Problems?

These problems maintain the same ratio (1.51) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.