Home / 85,406.94-128,048.85-52,119.18

Finding the Fourth Proportional to 85,406.94, 128,048.85 and 52,119.18

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Solution

The fourth proportional to 85,406.94, 128,048.85 and 52,119.18 is: 78,141.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,406.94 : 128,048.85 = 52,119.18 : x
  2. Step 2: Convert to fraction form
    85,406.94/128,048.85 = 52,119.18/x
  3. Step 3: Cross multiply
    85,406.94x = 128,048.85 × 52,119.18
  4. Step 4: Simplify right side
    85,406.94x = 6,673,801,061.94
  5. Step 5: Solve for x
    x = 6,673,801,061.94/85,406.94
  6. Step 6: Final answer
    x = 78,141.20

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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.