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Finding the Fourth Proportional to 162,121.50, 243,269.73 and 79,015.50

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Solution

The fourth proportional to 162,121.50, 243,269.73 and 79,015.50 is: 118,565.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    162,121.50 : 243,269.73 = 79,015.50 : x
  2. Step 2: Convert to fraction form
    162,121.50/243,269.73 = 79,015.50/x
  3. Step 3: Cross multiply
    162,121.50x = 243,269.73 × 79,015.50
  4. Step 4: Simplify right side
    162,121.50x = 19,222,079,350.82
  5. Step 5: Solve for x
    x = 19,222,079,350.82/162,121.50
  6. Step 6: Final answer
    x = 118,565.89

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1.5x scale

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.