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Finding the Fourth Proportional to 242,790.40, 335,052.80 and 135,372.80

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Solution

The fourth proportional to 242,790.40, 335,052.80 and 135,372.80 is: 186,815.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    242,790.40 : 335,052.80 = 135,372.80 : x
  2. Step 2: Convert to fraction form
    242,790.40/335,052.80 = 135,372.80/x
  3. Step 3: Cross multiply
    242,790.40x = 335,052.80 × 135,372.80
  4. Step 4: Simplify right side
    242,790.40x = 45,357,035,683.84
  5. Step 5: Solve for x
    x = 45,357,035,683.84/242,790.40
  6. Step 6: Final answer
    x = 186,815.61

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.