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Finding the Fourth Proportional to 112,653.80, 168,980.70 and 68,330.60

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Solution

The fourth proportional to 112,653.80, 168,980.70 and 68,330.60 is: 102,495.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    112,653.80 : 168,980.70 = 68,330.60 : x
  2. Step 2: Convert to fraction form
    112,653.80/168,980.70 = 68,330.60/x
  3. Step 3: Cross multiply
    112,653.80x = 168,980.70 × 68,330.60
  4. Step 4: Simplify right side
    112,653.80x = 11,546,552,619.42
  5. Step 5: Solve for x
    x = 11,546,552,619.42/112,653.80
  6. Step 6: Final answer
    x = 102,495.90

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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.