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Finding the Fourth Proportional to 145,052.70, 217,579.05 and 91,908.60

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Solution

The fourth proportional to 145,052.70, 217,579.05 and 91,908.60 is: 137,862.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    145,052.70 : 217,579.05 = 91,908.60 : x
  2. Step 2: Convert to fraction form
    145,052.70/217,579.05 = 91,908.60/x
  3. Step 3: Cross multiply
    145,052.70x = 217,579.05 × 91,908.60
  4. Step 4: Simplify right side
    145,052.70x = 19,997,385,874.83
  5. Step 5: Solve for x
    x = 19,997,385,874.83/145,052.70
  6. Step 6: Final answer
    x = 137,862.90

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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.