Home / 90,781.21-125,367.90-74,806.80

Finding the Fourth Proportional to 90,781.21, 125,367.90 and 74,806.80

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Solution

The fourth proportional to 90,781.21, 125,367.90 and 74,806.80 is: 103,307.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    90,781.21 : 125,367.90 = 74,806.80 : x
  2. Step 2: Convert to fraction form
    90,781.21/125,367.90 = 74,806.80/x
  3. Step 3: Cross multiply
    90,781.21x = 125,367.90 × 74,806.80
  4. Step 4: Simplify right side
    90,781.21x = 9,378,371,421.72
  5. Step 5: Solve for x
    x = 9,378,371,421.72/90,781.21
  6. Step 6: Final answer
    x = 103,307.41

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.