Home / 128,542.48-192,478.38-103,445.44

Finding the Fourth Proportional to 128,542.48, 192,478.38 and 103,445.44

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Solution

The fourth proportional to 128,542.48, 192,478.38 and 103,445.44 is: 154,898.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,542.48 : 192,478.38 = 103,445.44 : x
  2. Step 2: Convert to fraction form
    128,542.48/192,478.38 = 103,445.44/x
  3. Step 3: Cross multiply
    128,542.48x = 192,478.38 × 103,445.44
  4. Step 4: Simplify right side
    128,542.48x = 19,911,010,709.59
  5. Step 5: Solve for x
    x = 19,911,010,709.59/128,542.48
  6. Step 6: Final answer
    x = 154,898.29

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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.