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Finding the Fourth Proportional to 69,989.04, 105,027.30 and 28,436.04

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Solution

The fourth proportional to 69,989.04, 105,027.30 and 28,436.04 is: 42,671.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    69,989.04 : 105,027.30 = 28,436.04 : x
  2. Step 2: Convert to fraction form
    69,989.04/105,027.30 = 28,436.04/x
  3. Step 3: Cross multiply
    69,989.04x = 105,027.30 × 28,436.04
  4. Step 4: Simplify right side
    69,989.04x = 2,986,560,503.89
  5. Step 5: Solve for x
    x = 2,986,560,503.89/69,989.04
  6. Step 6: Final answer
    x = 42,671.83

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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.