Home / 128,259.36-192,427.92-90,891.72

Finding the Fourth Proportional to 128,259.36, 192,427.92 and 90,891.72

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Solution

The fourth proportional to 128,259.36, 192,427.92 and 90,891.72 is: 136,365.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,259.36 : 192,427.92 = 90,891.72 : x
  2. Step 2: Convert to fraction form
    128,259.36/192,427.92 = 90,891.72/x
  3. Step 3: Cross multiply
    128,259.36x = 192,427.92 × 90,891.72
  4. Step 4: Simplify right side
    128,259.36x = 17,490,104,624.82
  5. Step 5: Solve for x
    x = 17,490,104,624.82/128,259.36
  6. Step 6: Final answer
    x = 136,365.13

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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.