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Finding the Fourth Proportional to 69,981.60, 104,972.40 and 68,998.80

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Solution

The fourth proportional to 69,981.60, 104,972.40 and 68,998.80 is: 103,498.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    69,981.60 : 104,972.40 = 68,998.80 : x
  2. Step 2: Convert to fraction form
    69,981.60/104,972.40 = 68,998.80/x
  3. Step 3: Cross multiply
    69,981.60x = 104,972.40 × 68,998.80
  4. Step 4: Simplify right side
    69,981.60x = 7,242,969,633.12
  5. Step 5: Solve for x
    x = 7,242,969,633.12/69,981.60
  6. Step 6: Final answer
    x = 103,498.20

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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.