Home / 221,009.35-305,029.60-130,387.59

Finding the Fourth Proportional to 221,009.35, 305,029.60 and 130,387.59

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Solution

The fourth proportional to 221,009.35, 305,029.60 and 130,387.59 is: 179,956.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    221,009.35 : 305,029.60 = 130,387.59 : x
  2. Step 2: Convert to fraction form
    221,009.35/305,029.60 = 130,387.59/x
  3. Step 3: Cross multiply
    221,009.35x = 305,029.60 × 130,387.59
  4. Step 4: Simplify right side
    221,009.35x = 39,772,074,096.70
  5. Step 5: Solve for x
    x = 39,772,074,096.70/221,009.35
  6. Step 6: Final answer
    x = 179,956.52

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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.