Home / 128,947.36-193,422.32-38,990.80

Finding the Fourth Proportional to 128,947.36, 193,422.32 and 38,990.80

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Solution

The fourth proportional to 128,947.36, 193,422.32 and 38,990.80 is: 58,486.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,947.36 : 193,422.32 = 38,990.80 : x
  2. Step 2: Convert to fraction form
    128,947.36/193,422.32 = 38,990.80/x
  3. Step 3: Cross multiply
    128,947.36x = 193,422.32 × 38,990.80
  4. Step 4: Simplify right side
    128,947.36x = 7,541,690,994.66
  5. Step 5: Solve for x
    x = 7,541,690,994.66/128,947.36
  6. Step 6: Final answer
    x = 58,486.59

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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.