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Finding the Fourth Proportional to 85,625.81, 128,406.86 and 29,450.15

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Solution

The fourth proportional to 85,625.81, 128,406.86 and 29,450.15 is: 44,164.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,625.81 : 128,406.86 = 29,450.15 : x
  2. Step 2: Convert to fraction form
    85,625.81/128,406.86 = 29,450.15/x
  3. Step 3: Cross multiply
    85,625.81x = 128,406.86 × 29,450.15
  4. Step 4: Simplify right side
    85,625.81x = 3,781,601,140.78
  5. Step 5: Solve for x
    x = 3,781,601,140.78/85,625.81
  6. Step 6: Final answer
    x = 44,164.27

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.