Home / 128,282.88-192,455.61-90,406.02

Finding the Fourth Proportional to 128,282.88, 192,455.61 and 90,406.02

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Solution

The fourth proportional to 128,282.88, 192,455.61 and 90,406.02 is: 135,631.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,282.88 : 192,455.61 = 90,406.02 : x
  2. Step 2: Convert to fraction form
    128,282.88/192,455.61 = 90,406.02/x
  3. Step 3: Cross multiply
    128,282.88x = 192,455.61 × 90,406.02
  4. Step 4: Simplify right side
    128,282.88x = 17,399,145,726.77
  5. Step 5: Solve for x
    x = 17,399,145,726.77/128,282.88
  6. Step 6: Final answer
    x = 135,631.08

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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.