Home / 128,945.19-193,416.84-90,837.60

Finding the Fourth Proportional to 128,945.19, 193,416.84 and 90,837.60

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Solution

The fourth proportional to 128,945.19, 193,416.84 and 90,837.60 is: 136,255.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,945.19 : 193,416.84 = 90,837.60 : x
  2. Step 2: Convert to fraction form
    128,945.19/193,416.84 = 90,837.60/x
  3. Step 3: Cross multiply
    128,945.19x = 193,416.84 × 90,837.60
  4. Step 4: Simplify right side
    128,945.19x = 17,569,521,545.18
  5. Step 5: Solve for x
    x = 17,569,521,545.18/128,945.19
  6. Step 6: Final answer
    x = 136,255.73

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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.