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Finding the Fourth Proportional to 145,305.06, 200,515.41 and 81,645.54

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Solution

The fourth proportional to 145,305.06, 200,515.41 and 81,645.54 is: 112,667.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    145,305.06 : 200,515.41 = 81,645.54 : x
  2. Step 2: Convert to fraction form
    145,305.06/200,515.41 = 81,645.54/x
  3. Step 3: Cross multiply
    145,305.06x = 200,515.41 × 81,645.54
  4. Step 4: Simplify right side
    145,305.06x = 16,371,188,927.77
  5. Step 5: Solve for x
    x = 16,371,188,927.77/145,305.06
  6. Step 6: Final answer
    x = 112,667.71

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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.