Home / 85,719.40-128,579.10-26,554.60

Finding the Fourth Proportional to 85,719.40, 128,579.10 and 26,554.60

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Solution

The fourth proportional to 85,719.40, 128,579.10 and 26,554.60 is: 39,831.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,719.40 : 128,579.10 = 26,554.60 : x
  2. Step 2: Convert to fraction form
    85,719.40/128,579.10 = 26,554.60/x
  3. Step 3: Cross multiply
    85,719.40x = 128,579.10 × 26,554.60
  4. Step 4: Simplify right side
    85,719.40x = 3,414,366,568.86
  5. Step 5: Solve for x
    x = 3,414,366,568.86/85,719.40
  6. Step 6: Final answer
    x = 39,831.90

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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.