Home / 185,100.15-255,439-100,217.21

Finding the Fourth Proportional to 185,100.15, 255,439 and 100,217.21

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Solution

The fourth proportional to 185,100.15, 255,439 and 100,217.21 is: 138,300.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    185,100.15 : 255,439 = 100,217.21 : x
  2. Step 2: Convert to fraction form
    185,100.15/255,439 = 100,217.21/x
  3. Step 3: Cross multiply
    185,100.15x = 255,439 × 100,217.21
  4. Step 4: Simplify right side
    185,100.15x = 25,599,383,905.19
  5. Step 5: Solve for x
    x = 25,599,383,905.19/185,100.15
  6. Step 6: Final answer
    x = 138,300.18

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.