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Finding the Fourth Proportional to 112,012.80, 168,019.20 and 109,420.80

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Solution

The fourth proportional to 112,012.80, 168,019.20 and 109,420.80 is: 164,131.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    112,012.80 : 168,019.20 = 109,420.80 : x
  2. Step 2: Convert to fraction form
    112,012.80/168,019.20 = 109,420.80/x
  3. Step 3: Cross multiply
    112,012.80x = 168,019.20 × 109,420.80
  4. Step 4: Simplify right side
    112,012.80x = 18,384,795,279.36
  5. Step 5: Solve for x
    x = 18,384,795,279.36/112,012.80
  6. Step 6: Final answer
    x = 164,131.20

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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.