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Finding the Fourth Proportional to 85,569.84, 128,321.88 and 29,399.44

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Solution

The fourth proportional to 85,569.84, 128,321.88 and 29,399.44 is: 44,087.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,569.84 : 128,321.88 = 29,399.44 : x
  2. Step 2: Convert to fraction form
    85,569.84/128,321.88 = 29,399.44/x
  3. Step 3: Cross multiply
    85,569.84x = 128,321.88 × 29,399.44
  4. Step 4: Simplify right side
    85,569.84x = 3,772,591,411.75
  5. Step 5: Solve for x
    x = 3,772,591,411.75/85,569.84
  6. Step 6: Final answer
    x = 44,087.86

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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.