Home / 105,509.35-145,603.11-57,765.73

Finding the Fourth Proportional to 105,509.35, 145,603.11 and 57,765.73

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Solution

The fourth proportional to 105,509.35, 145,603.11 and 57,765.73 is: 79,716.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    105,509.35 : 145,603.11 = 57,765.73 : x
  2. Step 2: Convert to fraction form
    105,509.35/145,603.11 = 57,765.73/x
  3. Step 3: Cross multiply
    105,509.35x = 145,603.11 × 57,765.73
  4. Step 4: Simplify right side
    105,509.35x = 8,410,869,939.42
  5. Step 5: Solve for x
    x = 8,410,869,939.42/105,509.35
  6. Step 6: Final answer
    x = 79,716.82

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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.