Home / 90,305.90-135,465.33-31,140.71

Finding the Fourth Proportional to 90,305.90, 135,465.33 and 31,140.71

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Solution

The fourth proportional to 90,305.90, 135,465.33 and 31,140.71 is: 46,713.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    90,305.90 : 135,465.33 = 31,140.71 : x
  2. Step 2: Convert to fraction form
    90,305.90/135,465.33 = 31,140.71/x
  3. Step 3: Cross multiply
    90,305.90x = 135,465.33 × 31,140.71
  4. Step 4: Simplify right side
    90,305.90x = 4,218,486,556.58
  5. Step 5: Solve for x
    x = 4,218,486,556.58/90,305.90
  6. Step 6: Final answer
    x = 46,713.30

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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.