Home / 85,451.10-128,178.69-26,287.32

Finding the Fourth Proportional to 85,451.10, 128,178.69 and 26,287.32

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Solution

The fourth proportional to 85,451.10, 128,178.69 and 26,287.32 is: 39,431.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,451.10 : 128,178.69 = 26,287.32 : x
  2. Step 2: Convert to fraction form
    85,451.10/128,178.69 = 26,287.32/x
  3. Step 3: Cross multiply
    85,451.10x = 128,178.69 × 26,287.32
  4. Step 4: Simplify right side
    85,451.10x = 3,369,474,241.21
  5. Step 5: Solve for x
    x = 3,369,474,241.21/85,451.10
  6. Step 6: Final answer
    x = 39,431.61

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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.