Home / 102,990.10-154,355.55-91,326.10

Finding the Fourth Proportional to 102,990.10, 154,355.55 and 91,326.10

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Solution

The fourth proportional to 102,990.10, 154,355.55 and 91,326.10 is: 136,874.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    102,990.10 : 154,355.55 = 91,326.10 : x
  2. Step 2: Convert to fraction form
    102,990.10/154,355.55 = 91,326.10/x
  3. Step 3: Cross multiply
    102,990.10x = 154,355.55 × 91,326.10
  4. Step 4: Simplify right side
    102,990.10x = 14,096,690,394.86
  5. Step 5: Solve for x
    x = 14,096,690,394.86/102,990.10
  6. Step 6: Final answer
    x = 136,874.23

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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.