Home / 128,569.90-192,885.64-53,648.36

Finding the Fourth Proportional to 128,569.90, 192,885.64 and 53,648.36

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Solution

The fourth proportional to 128,569.90, 192,885.64 and 53,648.36 is: 80,485.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,569.90 : 192,885.64 = 53,648.36 : x
  2. Step 2: Convert to fraction form
    128,569.90/192,885.64 = 53,648.36/x
  3. Step 3: Cross multiply
    128,569.90x = 192,885.64 × 53,648.36
  4. Step 4: Simplify right side
    128,569.90x = 10,347,998,963.30
  5. Step 5: Solve for x
    x = 10,347,998,963.30/128,569.90
  6. Step 6: Final answer
    x = 80,485.39

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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.