Home / 90,416.88-135,434.43-72,550.71

Finding the Fourth Proportional to 90,416.88, 135,434.43 and 72,550.71

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Solution

The fourth proportional to 90,416.88, 135,434.43 and 72,550.71 is: 108,672.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    90,416.88 : 135,434.43 = 72,550.71 : x
  2. Step 2: Convert to fraction form
    90,416.88/135,434.43 = 72,550.71/x
  3. Step 3: Cross multiply
    90,416.88x = 135,434.43 × 72,550.71
  4. Step 4: Simplify right side
    90,416.88x = 9,825,864,054.95
  5. Step 5: Solve for x
    x = 9,825,864,054.95/90,416.88
  6. Step 6: Final answer
    x = 108,672.89

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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.