Home / 231,980.40-320,155.20-130,005.36

Finding the Fourth Proportional to 231,980.40, 320,155.20 and 130,005.36

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Solution

The fourth proportional to 231,980.40, 320,155.20 and 130,005.36 is: 179,419.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    231,980.40 : 320,155.20 = 130,005.36 : x
  2. Step 2: Convert to fraction form
    231,980.40/320,155.20 = 130,005.36/x
  3. Step 3: Cross multiply
    231,980.40x = 320,155.20 × 130,005.36
  4. Step 4: Simplify right side
    231,980.40x = 41,621,892,031.87
  5. Step 5: Solve for x
    x = 41,621,892,031.87/231,980.40
  6. Step 6: Final answer
    x = 179,419.86

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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.