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Finding the Fourth Proportional to 112,273.60, 168,021.60 and 77,281.60

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Solution

The fourth proportional to 112,273.60, 168,021.60 and 77,281.60 is: 115,654.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    112,273.60 : 168,021.60 = 77,281.60 : x
  2. Step 2: Convert to fraction form
    112,273.60/168,021.60 = 77,281.60/x
  3. Step 3: Cross multiply
    112,273.60x = 168,021.60 × 77,281.60
  4. Step 4: Simplify right side
    112,273.60x = 12,984,978,082.56
  5. Step 5: Solve for x
    x = 12,984,978,082.56/112,273.60
  6. Step 6: Final answer
    x = 115,654.78

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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.