Home / 128,159.82-192,130.24-90,601.74

Finding the Fourth Proportional to 128,159.82, 192,130.24 and 90,601.74

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Solution

The fourth proportional to 128,159.82, 192,130.24 and 90,601.74 is: 135,825.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,159.82 : 192,130.24 = 90,601.74 : x
  2. Step 2: Convert to fraction form
    128,159.82/192,130.24 = 90,601.74/x
  3. Step 3: Cross multiply
    128,159.82x = 192,130.24 × 90,601.74
  4. Step 4: Simplify right side
    128,159.82x = 17,407,334,050.62
  5. Step 5: Solve for x
    x = 17,407,334,050.62/128,159.82
  6. Step 6: Final answer
    x = 135,825.21

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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.