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Finding the Fourth Proportional to 144,868.60, 217,302.90 and 74,009.80

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Solution

The fourth proportional to 144,868.60, 217,302.90 and 74,009.80 is: 111,014.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    144,868.60 : 217,302.90 = 74,009.80 : x
  2. Step 2: Convert to fraction form
    144,868.60/217,302.90 = 74,009.80/x
  3. Step 3: Cross multiply
    144,868.60x = 217,302.90 × 74,009.80
  4. Step 4: Simplify right side
    144,868.60x = 16,082,544,168.42
  5. Step 5: Solve for x
    x = 16,082,544,168.42/144,868.60
  6. Step 6: Final answer
    x = 111,014.70

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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.