Home / 85,288.10-128,063.36-76,015.22

Finding the Fourth Proportional to 85,288.10, 128,063.36 and 76,015.22

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Solution

The fourth proportional to 85,288.10, 128,063.36 and 76,015.22 is: 114,139.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,288.10 : 128,063.36 = 76,015.22 : x
  2. Step 2: Convert to fraction form
    85,288.10/128,063.36 = 76,015.22/x
  3. Step 3: Cross multiply
    85,288.10x = 128,063.36 × 76,015.22
  4. Step 4: Simplify right side
    85,288.10x = 9,734,764,484.34
  5. Step 5: Solve for x
    x = 9,734,764,484.34/85,288.10
  6. Step 6: Final answer
    x = 114,139.77

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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.