Home / 208,780.47-313,159.37-128,833.67

Finding the Fourth Proportional to 208,780.47, 313,159.37 and 128,833.67

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Solution

The fourth proportional to 208,780.47, 313,159.37 and 128,833.67 is: 193,243.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    208,780.47 : 313,159.37 = 128,833.67 : x
  2. Step 2: Convert to fraction form
    208,780.47/313,159.37 = 128,833.67/x
  3. Step 3: Cross multiply
    208,780.47x = 313,159.37 × 128,833.67
  4. Step 4: Simplify right side
    208,780.47x = 40,345,471,070.72
  5. Step 5: Solve for x
    x = 40,345,471,070.72/208,780.47
  6. Step 6: Final answer
    x = 193,243.51

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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.