Home / 208,020.80-312,031.20-172,591.40

Finding the Fourth Proportional to 208,020.80, 312,031.20 and 172,591.40

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Solution

The fourth proportional to 208,020.80, 312,031.20 and 172,591.40 is: 258,887.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    208,020.80 : 312,031.20 = 172,591.40 : x
  2. Step 2: Convert to fraction form
    208,020.80/312,031.20 = 172,591.40/x
  3. Step 3: Cross multiply
    208,020.80x = 312,031.20 × 172,591.40
  4. Step 4: Simplify right side
    208,020.80x = 53,853,901,651.68
  5. Step 5: Solve for x
    x = 53,853,901,651.68/208,020.80
  6. Step 6: Final answer
    x = 258,887.10

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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.