Home / 105,189.24-145,153.80-57,441.72

Finding the Fourth Proportional to 105,189.24, 145,153.80 and 57,441.72

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Solution

The fourth proportional to 105,189.24, 145,153.80 and 57,441.72 is: 79,265.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    105,189.24 : 145,153.80 = 57,441.72 : x
  2. Step 2: Convert to fraction form
    105,189.24/145,153.80 = 57,441.72/x
  3. Step 3: Cross multiply
    105,189.24x = 145,153.80 × 57,441.72
  4. Step 4: Simplify right side
    105,189.24x = 8,337,883,936.54
  5. Step 5: Solve for x
    x = 8,337,883,936.54/105,189.24
  6. Step 6: Final answer
    x = 79,265.56

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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.