Home / 85,947.42-128,921.10-26,787.85

Finding the Fourth Proportional to 85,947.42, 128,921.10 and 26,787.85

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Solution

The fourth proportional to 85,947.42, 128,921.10 and 26,787.85 is: 40,181.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,947.42 : 128,921.10 = 26,787.85 : x
  2. Step 2: Convert to fraction form
    85,947.42/128,921.10 = 26,787.85/x
  3. Step 3: Cross multiply
    85,947.42x = 128,921.10 × 26,787.85
  4. Step 4: Simplify right side
    85,947.42x = 3,453,519,088.64
  5. Step 5: Solve for x
    x = 3,453,519,088.64/85,947.42
  6. Step 6: Final answer
    x = 40,181.77

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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.