Home / 85,787.23-128,698.05-29,629.40

Finding the Fourth Proportional to 85,787.23, 128,698.05 and 29,629.40

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Solution

The fourth proportional to 85,787.23, 128,698.05 and 29,629.40 is: 44,450.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,787.23 : 128,698.05 = 29,629.40 : x
  2. Step 2: Convert to fraction form
    85,787.23/128,698.05 = 29,629.40/x
  3. Step 3: Cross multiply
    85,787.23x = 128,698.05 × 29,629.40
  4. Step 4: Simplify right side
    85,787.23x = 3,813,245,854.52
  5. Step 5: Solve for x
    x = 3,813,245,854.52/85,787.23
  6. Step 6: Final answer
    x = 44,450.04

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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.