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Finding the Fourth Proportional to 112,114.80, 168,172.20 and 105,991.20

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Solution

The fourth proportional to 112,114.80, 168,172.20 and 105,991.20 is: 158,986.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    112,114.80 : 168,172.20 = 105,991.20 : x
  2. Step 2: Convert to fraction form
    112,114.80/168,172.20 = 105,991.20/x
  3. Step 3: Cross multiply
    112,114.80x = 168,172.20 × 105,991.20
  4. Step 4: Simplify right side
    112,114.80x = 17,824,773,284.64
  5. Step 5: Solve for x
    x = 17,824,773,284.64/112,114.80
  6. Step 6: Final answer
    x = 158,986.80

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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.