Home / 112,015.20-168,022.80-78,772.80

Finding the Fourth Proportional to 112,015.20, 168,022.80 and 78,772.80

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Solution

The fourth proportional to 112,015.20, 168,022.80 and 78,772.80 is: 118,159.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    112,015.20 : 168,022.80 = 78,772.80 : x
  2. Step 2: Convert to fraction form
    112,015.20/168,022.80 = 78,772.80/x
  3. Step 3: Cross multiply
    112,015.20x = 168,022.80 × 78,772.80
  4. Step 4: Simplify right side
    112,015.20x = 13,235,626,419.84
  5. Step 5: Solve for x
    x = 13,235,626,419.84/112,015.20
  6. Step 6: Final answer
    x = 118,159.20

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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.