Home / 85,583.28-128,405.32-38,194.06

Finding the Fourth Proportional to 85,583.28, 128,405.32 and 38,194.06

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Solution

The fourth proportional to 85,583.28, 128,405.32 and 38,194.06 is: 57,304.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,583.28 : 128,405.32 = 38,194.06 : x
  2. Step 2: Convert to fraction form
    85,583.28/128,405.32 = 38,194.06/x
  3. Step 3: Cross multiply
    85,583.28x = 128,405.32 × 38,194.06
  4. Step 4: Simplify right side
    85,583.28x = 4,904,320,496.40
  5. Step 5: Solve for x
    x = 4,904,320,496.40/85,583.28
  6. Step 6: Final answer
    x = 57,304.66

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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.