Home / 185,238.15-255,628.91-100,355.21

Finding the Fourth Proportional to 185,238.15, 255,628.91 and 100,355.21

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Solution

The fourth proportional to 185,238.15, 255,628.91 and 100,355.21 is: 138,490.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    185,238.15 : 255,628.91 = 100,355.21 : x
  2. Step 2: Convert to fraction form
    185,238.15/255,628.91 = 100,355.21/x
  3. Step 3: Cross multiply
    185,238.15x = 255,628.91 × 100,355.21
  4. Step 4: Simplify right side
    185,238.15x = 25,653,693,835.08
  5. Step 5: Solve for x
    x = 25,653,693,835.08/185,238.15
  6. Step 6: Final answer
    x = 138,490.34

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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.