Home / 85,823.21-128,649.33-40,765.55

Finding the Fourth Proportional to 85,823.21, 128,649.33 and 40,765.55

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Solution

The fourth proportional to 85,823.21, 128,649.33 and 40,765.55 is: 61,107.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,823.21 : 128,649.33 = 40,765.55 : x
  2. Step 2: Convert to fraction form
    85,823.21/128,649.33 = 40,765.55/x
  3. Step 3: Cross multiply
    85,823.21x = 128,649.33 × 40,765.55
  4. Step 4: Simplify right side
    85,823.21x = 5,244,460,051.33
  5. Step 5: Solve for x
    x = 5,244,460,051.33/85,823.21
  6. Step 6: Final answer
    x = 61,107.71

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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.