Home / 208,177.12-312,281.48-81,756.37

Finding the Fourth Proportional to 208,177.12, 312,281.48 and 81,756.37

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Solution

The fourth proportional to 208,177.12, 312,281.48 and 81,756.37 is: 122,640.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    208,177.12 : 312,281.48 = 81,756.37 : x
  2. Step 2: Convert to fraction form
    208,177.12/312,281.48 = 81,756.37/x
  3. Step 3: Cross multiply
    208,177.12x = 312,281.48 × 81,756.37
  4. Step 4: Simplify right side
    208,177.12x = 25,531,000,223.03
  5. Step 5: Solve for x
    x = 25,531,000,223.03/208,177.12
  6. Step 6: Final answer
    x = 122,640.76

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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.