Home / 53,435.38-80,139.40-20,145.59

Finding the Fourth Proportional to 53,435.38, 80,139.40 and 20,145.59

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Solution

The fourth proportional to 53,435.38, 80,139.40 and 20,145.59 is: 30,213.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    53,435.38 : 80,139.40 = 20,145.59 : x
  2. Step 2: Convert to fraction form
    53,435.38/80,139.40 = 20,145.59/x
  3. Step 3: Cross multiply
    53,435.38x = 80,139.40 × 20,145.59
  4. Step 4: Simplify right side
    53,435.38x = 1,614,455,495.25
  5. Step 5: Solve for x
    x = 1,614,455,495.25/53,435.38
  6. Step 6: Final answer
    x = 30,213.23

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1.5x scale

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.