Home / 85,845.90-128,787.31-28,925.46

Finding the Fourth Proportional to 85,845.90, 128,787.31 and 28,925.46

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Solution

The fourth proportional to 85,845.90, 128,787.31 and 28,925.46 is: 43,394.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,845.90 : 128,787.31 = 28,925.46 : x
  2. Step 2: Convert to fraction form
    85,845.90/128,787.31 = 28,925.46/x
  3. Step 3: Cross multiply
    85,845.90x = 128,787.31 × 28,925.46
  4. Step 4: Simplify right side
    85,845.90x = 3,725,232,183.91
  5. Step 5: Solve for x
    x = 3,725,232,183.91/85,845.90
  6. Step 6: Final answer
    x = 43,394.41

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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.