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Finding the Fourth Proportional to 81,277.60, 121,770.60 and 69,613.60

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Solution

The fourth proportional to 81,277.60, 121,770.60 and 69,613.60 is: 104,295.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,277.60 : 121,770.60 = 69,613.60 : x
  2. Step 2: Convert to fraction form
    81,277.60/121,770.60 = 69,613.60/x
  3. Step 3: Cross multiply
    81,277.60x = 121,770.60 × 69,613.60
  4. Step 4: Simplify right side
    81,277.60x = 8,476,889,840.16
  5. Step 5: Solve for x
    x = 8,476,889,840.16/81,277.60
  6. Step 6: Final answer
    x = 104,295.52

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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.