Home / 259,715.10-389,572.65-109,905.60

Finding the Fourth Proportional to 259,715.10, 389,572.65 and 109,905.60

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Solution

The fourth proportional to 259,715.10, 389,572.65 and 109,905.60 is: 164,858.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    259,715.10 : 389,572.65 = 109,905.60 : x
  2. Step 2: Convert to fraction form
    259,715.10/389,572.65 = 109,905.60/x
  3. Step 3: Cross multiply
    259,715.10x = 389,572.65 × 109,905.60
  4. Step 4: Simplify right side
    259,715.10x = 42,816,215,841.84
  5. Step 5: Solve for x
    x = 42,816,215,841.84/259,715.10
  6. Step 6: Final answer
    x = 164,858.40

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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.