Home / 259,801.90-389,621.85-102,078.70

Finding the Fourth Proportional to 259,801.90, 389,621.85 and 102,078.70

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Solution

The fourth proportional to 259,801.90, 389,621.85 and 102,078.70 is: 153,086.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    259,801.90 : 389,621.85 = 102,078.70 : x
  2. Step 2: Convert to fraction form
    259,801.90/389,621.85 = 102,078.70/x
  3. Step 3: Cross multiply
    259,801.90x = 389,621.85 × 102,078.70
  4. Step 4: Simplify right side
    259,801.90x = 39,772,091,939.60
  5. Step 5: Solve for x
    x = 39,772,091,939.60/259,801.90
  6. Step 6: Final answer
    x = 153,086.22

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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.