Home / 85,464.12-128,115.54-30,029.88

Finding the Fourth Proportional to 85,464.12, 128,115.54 and 30,029.88

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Solution

The fourth proportional to 85,464.12, 128,115.54 and 30,029.88 is: 45,016.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,464.12 : 128,115.54 = 30,029.88 : x
  2. Step 2: Convert to fraction form
    85,464.12/128,115.54 = 30,029.88/x
  3. Step 3: Cross multiply
    85,464.12x = 128,115.54 × 30,029.88
  4. Step 4: Simplify right side
    85,464.12x = 3,847,294,292.34
  5. Step 5: Solve for x
    x = 3,847,294,292.34/85,464.12
  6. Step 6: Final answer
    x = 45,016.49

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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.