Home / 85,759.20-128,756.63-43,667.55

Finding the Fourth Proportional to 85,759.20, 128,756.63 and 43,667.55

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Solution

The fourth proportional to 85,759.20, 128,756.63 and 43,667.55 is: 65,561.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,759.20 : 128,756.63 = 43,667.55 : x
  2. Step 2: Convert to fraction form
    85,759.20/128,756.63 = 43,667.55/x
  3. Step 3: Cross multiply
    85,759.20x = 128,756.63 × 43,667.55
  4. Step 4: Simplify right side
    85,759.20x = 5,622,486,360.02
  5. Step 5: Solve for x
    x = 5,622,486,360.02/85,759.20
  6. Step 6: Final answer
    x = 65,561.32

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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.