Home / 128,187.29-192,330.18-90,272.95

Finding the Fourth Proportional to 128,187.29, 192,330.18 and 90,272.95

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Solution

The fourth proportional to 128,187.29, 192,330.18 and 90,272.95 is: 135,444.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,187.29 : 192,330.18 = 90,272.95 : x
  2. Step 2: Convert to fraction form
    128,187.29/192,330.18 = 90,272.95/x
  3. Step 3: Cross multiply
    128,187.29x = 192,330.18 × 90,272.95
  4. Step 4: Simplify right side
    128,187.29x = 17,362,212,241.81
  5. Step 5: Solve for x
    x = 17,362,212,241.81/128,187.29
  6. Step 6: Final answer
    x = 135,444.10

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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.