Home / 427,582.17-641,192.79-128,105.31

Finding the Fourth Proportional to 427,582.17, 641,192.79 and 128,105.31

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Solution

The fourth proportional to 427,582.17, 641,192.79 and 128,105.31 is: 192,103.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    427,582.17 : 641,192.79 = 128,105.31 : x
  2. Step 2: Convert to fraction form
    427,582.17/641,192.79 = 128,105.31/x
  3. Step 3: Cross multiply
    427,582.17x = 641,192.79 × 128,105.31
  4. Step 4: Simplify right side
    427,582.17x = 82,140,201,132.71
  5. Step 5: Solve for x
    x = 82,140,201,132.71/427,582.17
  6. Step 6: Final answer
    x = 192,103.90

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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.