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Finding the Fourth Proportional to 89,982.80, 134,928.90 and 29,990.02

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Solution

The fourth proportional to 89,982.80, 134,928.90 and 29,990.02 is: 44,969.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    89,982.80 : 134,928.90 = 29,990.02 : x
  2. Step 2: Convert to fraction form
    89,982.80/134,928.90 = 29,990.02/x
  3. Step 3: Cross multiply
    89,982.80x = 134,928.90 × 29,990.02
  4. Step 4: Simplify right side
    89,982.80x = 4,046,520,409.58
  5. Step 5: Solve for x
    x = 4,046,520,409.58/89,982.80
  6. Step 6: Final answer
    x = 44,969.93

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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.