Home / 109,515.20-164,272.80-74,085.80

Finding the Fourth Proportional to 109,515.20, 164,272.80 and 74,085.80

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Solution

The fourth proportional to 109,515.20, 164,272.80 and 74,085.80 is: 111,128.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    109,515.20 : 164,272.80 = 74,085.80 : x
  2. Step 2: Convert to fraction form
    109,515.20/164,272.80 = 74,085.80/x
  3. Step 3: Cross multiply
    109,515.20x = 164,272.80 × 74,085.80
  4. Step 4: Simplify right side
    109,515.20x = 12,170,281,806.24
  5. Step 5: Solve for x
    x = 12,170,281,806.24/109,515.20
  6. Step 6: Final answer
    x = 111,128.70

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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.