Home / 128,192.95-192,328.26-90,825.31

Finding the Fourth Proportional to 128,192.95, 192,328.26 and 90,825.31

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Solution

The fourth proportional to 128,192.95, 192,328.26 and 90,825.31 is: 136,265.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,192.95 : 192,328.26 = 90,825.31 : x
  2. Step 2: Convert to fraction form
    128,192.95/192,328.26 = 90,825.31/x
  3. Step 3: Cross multiply
    128,192.95x = 192,328.26 × 90,825.31
  4. Step 4: Simplify right side
    128,192.95x = 17,468,273,836.26
  5. Step 5: Solve for x
    x = 17,468,273,836.26/128,192.95
  6. Step 6: Final answer
    x = 136,265.48

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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.