Home / 91,105.05-125,783.51-57,160.11

Finding the Fourth Proportional to 91,105.05, 125,783.51 and 57,160.11

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Solution

The fourth proportional to 91,105.05, 125,783.51 and 57,160.11 is: 78,917.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    91,105.05 : 125,783.51 = 57,160.11 : x
  2. Step 2: Convert to fraction form
    91,105.05/125,783.51 = 57,160.11/x
  3. Step 3: Cross multiply
    91,105.05x = 125,783.51 × 57,160.11
  4. Step 4: Simplify right side
    91,105.05x = 7,189,798,981.99
  5. Step 5: Solve for x
    x = 7,189,798,981.99/91,105.05
  6. Step 6: Final answer
    x = 78,917.68

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.