Home / 128,142.15-192,216.27-39,396.47

Finding the Fourth Proportional to 128,142.15, 192,216.27 and 39,396.47

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Solution

The fourth proportional to 128,142.15, 192,216.27 and 39,396.47 is: 59,095.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,142.15 : 192,216.27 = 39,396.47 : x
  2. Step 2: Convert to fraction form
    128,142.15/192,216.27 = 39,396.47/x
  3. Step 3: Cross multiply
    128,142.15x = 192,216.27 × 39,396.47
  4. Step 4: Simplify right side
    128,142.15x = 7,572,641,553.49
  5. Step 5: Solve for x
    x = 7,572,641,553.49/128,142.15
  6. Step 6: Final answer
    x = 59,095.63

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1.5x scale

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.