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Finding the Fourth Proportional to 123,745.57, 170,639.81 and 73,434.85

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Solution

The fourth proportional to 123,745.57, 170,639.81 and 73,434.85 is: 101,263.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    123,745.57 : 170,639.81 = 73,434.85 : x
  2. Step 2: Convert to fraction form
    123,745.57/170,639.81 = 73,434.85/x
  3. Step 3: Cross multiply
    123,745.57x = 170,639.81 × 73,434.85
  4. Step 4: Simplify right side
    123,745.57x = 12,530,908,484.20
  5. Step 5: Solve for x
    x = 12,530,908,484.20/123,745.57
  6. Step 6: Final answer
    x = 101,263.49

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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.