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Finding the Fourth Proportional to 69,990.53, 104,990.92 and 29,970.47

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Solution

The fourth proportional to 69,990.53, 104,990.92 and 29,970.47 is: 44,957.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    69,990.53 : 104,990.92 = 29,970.47 : x
  2. Step 2: Convert to fraction form
    69,990.53/104,990.92 = 29,970.47/x
  3. Step 3: Cross multiply
    69,990.53x = 104,990.92 × 29,970.47
  4. Step 4: Simplify right side
    69,990.53x = 3,146,627,405.68
  5. Step 5: Solve for x
    x = 3,146,627,405.68/69,990.53
  6. Step 6: Final answer
    x = 44,957.91

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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.