Home / 85,571.19-128,356.79-83,602.89

Finding the Fourth Proportional to 85,571.19, 128,356.79 and 83,602.89

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Solution

The fourth proportional to 85,571.19, 128,356.79 and 83,602.89 is: 125,404.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,571.19 : 128,356.79 = 83,602.89 : x
  2. Step 2: Convert to fraction form
    85,571.19/128,356.79 = 83,602.89/x
  3. Step 3: Cross multiply
    85,571.19x = 128,356.79 × 83,602.89
  4. Step 4: Simplify right side
    85,571.19x = 10,730,998,177.11
  5. Step 5: Solve for x
    x = 10,730,998,177.11/85,571.19
  6. Step 6: Final answer
    x = 125,404.34

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Similar ratio
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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.