Home / 90,863.12-136,083-87,710.24

Finding the Fourth Proportional to 90,863.12, 136,083 and 87,710.24

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Solution

The fourth proportional to 90,863.12, 136,083 and 87,710.24 is: 131,361.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    90,863.12 : 136,083 = 87,710.24 : x
  2. Step 2: Convert to fraction form
    90,863.12/136,083 = 87,710.24/x
  3. Step 3: Cross multiply
    90,863.12x = 136,083 × 87,710.24
  4. Step 4: Simplify right side
    90,863.12x = 11,935,872,589.92
  5. Step 5: Solve for x
    x = 11,935,872,589.92/90,863.12
  6. Step 6: Final answer
    x = 131,361.03

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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.