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Finding the Fourth Proportional to 69,359.60, 104,056.20 and 20,111.60

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Solution

The fourth proportional to 69,359.60, 104,056.20 and 20,111.60 is: 30,172.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    69,359.60 : 104,056.20 = 20,111.60 : x
  2. Step 2: Convert to fraction form
    69,359.60/104,056.20 = 20,111.60/x
  3. Step 3: Cross multiply
    69,359.60x = 104,056.20 × 20,111.60
  4. Step 4: Simplify right side
    69,359.60x = 2,092,736,671.92
  5. Step 5: Solve for x
    x = 2,092,736,671.92/69,359.60
  6. Step 6: Final answer
    x = 30,172.27

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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.