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Finding the Fourth Proportional to 80,998.65, 121,497.98 and 74,109.60

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Solution

The fourth proportional to 80,998.65, 121,497.98 and 74,109.60 is: 111,164.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    80,998.65 : 121,497.98 = 74,109.60 : x
  2. Step 2: Convert to fraction form
    80,998.65/121,497.98 = 74,109.60/x
  3. Step 3: Cross multiply
    80,998.65x = 121,497.98 × 74,109.60
  4. Step 4: Simplify right side
    80,998.65x = 9,004,166,328.06
  5. Step 5: Solve for x
    x = 9,004,166,328.06/80,998.65
  6. Step 6: Final answer
    x = 111,164.40

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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.