Home / 85,588.53-128,334.20-71,635.47

Finding the Fourth Proportional to 85,588.53, 128,334.20 and 71,635.47

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Solution

The fourth proportional to 85,588.53, 128,334.20 and 71,635.47 is: 107,412.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,588.53 : 128,334.20 = 71,635.47 : x
  2. Step 2: Convert to fraction form
    85,588.53/128,334.20 = 71,635.47/x
  3. Step 3: Cross multiply
    85,588.53x = 128,334.20 × 71,635.47
  4. Step 4: Simplify right side
    85,588.53x = 9,193,280,375.90
  5. Step 5: Solve for x
    x = 9,193,280,375.90/85,588.53
  6. Step 6: Final answer
    x = 107,412.53

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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.