Home / 90,863.12-136,295.42-31,698.69

Finding the Fourth Proportional to 90,863.12, 136,295.42 and 31,698.69

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Solution

The fourth proportional to 90,863.12, 136,295.42 and 31,698.69 is: 47,548.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    90,863.12 : 136,295.42 = 31,698.69 : x
  2. Step 2: Convert to fraction form
    90,863.12/136,295.42 = 31,698.69/x
  3. Step 3: Cross multiply
    90,863.12x = 136,295.42 × 31,698.69
  4. Step 4: Simplify right side
    90,863.12x = 4,320,386,108.51
  5. Step 5: Solve for x
    x = 4,320,386,108.51/90,863.12
  6. Step 6: Final answer
    x = 47,548.29

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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.