Home / 53,420.47-80,142.05-20,139.73

Finding the Fourth Proportional to 53,420.47, 80,142.05 and 20,139.73

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Solution

The fourth proportional to 53,420.47, 80,142.05 and 20,139.73 is: 30,213.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    53,420.47 : 80,142.05 = 20,139.73 : x
  2. Step 2: Convert to fraction form
    53,420.47/80,142.05 = 20,139.73/x
  3. Step 3: Cross multiply
    53,420.47x = 80,142.05 × 20,139.73
  4. Step 4: Simplify right side
    53,420.47x = 1,614,038,947.59
  5. Step 5: Solve for x
    x = 1,614,038,947.59/53,420.47
  6. Step 6: Final answer
    x = 30,213.87

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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.