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Finding the Fourth Proportional to 128,578.30, 192,898.25 and 53,656.77

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Solution

The fourth proportional to 128,578.30, 192,898.25 and 53,656.77 is: 80,498.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,578.30 : 192,898.25 = 53,656.77 : x
  2. Step 2: Convert to fraction form
    128,578.30/192,898.25 = 53,656.77/x
  3. Step 3: Cross multiply
    128,578.30x = 192,898.25 × 53,656.77
  4. Step 4: Simplify right side
    128,578.30x = 10,350,297,033.65
  5. Step 5: Solve for x
    x = 10,350,297,033.65/128,578.30
  6. Step 6: Final answer
    x = 80,498.01

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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.