Home / 185,980.40-278,701.35-128,218.36

Finding the Fourth Proportional to 185,980.40, 278,701.35 and 128,218.36

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Solution

The fourth proportional to 185,980.40, 278,701.35 and 128,218.36 is: 192,141.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    185,980.40 : 278,701.35 = 128,218.36 : x
  2. Step 2: Convert to fraction form
    185,980.40/278,701.35 = 128,218.36/x
  3. Step 3: Cross multiply
    185,980.40x = 278,701.35 × 128,218.36
  4. Step 4: Simplify right side
    185,980.40x = 35,734,629,716.48
  5. Step 5: Solve for x
    x = 35,734,629,716.48/185,980.40
  6. Step 6: Final answer
    x = 192,141.91

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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.