Home / 109,419.10-164,128.65-54,007.90

Finding the Fourth Proportional to 109,419.10, 164,128.65 and 54,007.90

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Solution

The fourth proportional to 109,419.10, 164,128.65 and 54,007.90 is: 81,011.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    109,419.10 : 164,128.65 = 54,007.90 : x
  2. Step 2: Convert to fraction form
    109,419.10/164,128.65 = 54,007.90/x
  3. Step 3: Cross multiply
    109,419.10x = 164,128.65 × 54,007.90
  4. Step 4: Simplify right side
    109,419.10x = 8,864,243,716.34
  5. Step 5: Solve for x
    x = 8,864,243,716.34/109,419.10
  6. Step 6: Final answer
    x = 81,011.85

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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.