Home / 90,259.20-135,427.20-57,004.80

Finding the Fourth Proportional to 90,259.20, 135,427.20 and 57,004.80

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Solution

The fourth proportional to 90,259.20, 135,427.20 and 57,004.80 is: 85,531.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    90,259.20 : 135,427.20 = 57,004.80 : x
  2. Step 2: Convert to fraction form
    90,259.20/135,427.20 = 57,004.80/x
  3. Step 3: Cross multiply
    90,259.20x = 135,427.20 × 57,004.80
  4. Step 4: Simplify right side
    90,259.20x = 7,720,000,450.56
  5. Step 5: Solve for x
    x = 7,720,000,450.56/90,259.20
  6. Step 6: Final answer
    x = 85,531.45

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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.