Home / 128,213.90-192,356.40-53,369.30

Finding the Fourth Proportional to 128,213.90, 192,356.40 and 53,369.30

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Solution

The fourth proportional to 128,213.90, 192,356.40 and 53,369.30 is: 80,068.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,213.90 : 192,356.40 = 53,369.30 : x
  2. Step 2: Convert to fraction form
    128,213.90/192,356.40 = 53,369.30/x
  3. Step 3: Cross multiply
    128,213.90x = 192,356.40 × 53,369.30
  4. Step 4: Simplify right side
    128,213.90x = 10,265,926,418.52
  5. Step 5: Solve for x
    x = 10,265,926,418.52/128,213.90
  6. Step 6: Final answer
    x = 80,068.75

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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.