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Finding the Fourth Proportional to 76,216.70, 114,325.05 and 20,812.70

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Solution

The fourth proportional to 76,216.70, 114,325.05 and 20,812.70 is: 31,219.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    76,216.70 : 114,325.05 = 20,812.70 : x
  2. Step 2: Convert to fraction form
    76,216.70/114,325.05 = 20,812.70/x
  3. Step 3: Cross multiply
    76,216.70x = 114,325.05 × 20,812.70
  4. Step 4: Simplify right side
    76,216.70x = 2,379,412,968.14
  5. Step 5: Solve for x
    x = 2,379,412,968.14/76,216.70
  6. Step 6: Final answer
    x = 31,219.05

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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.