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Finding the Fourth Proportional to 76,612.13, 114,918.19 and 21,208.13

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Solution

The fourth proportional to 76,612.13, 114,918.19 and 21,208.13 is: 31,812.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    76,612.13 : 114,918.19 = 21,208.13 : x
  2. Step 2: Convert to fraction form
    76,612.13/114,918.19 = 21,208.13/x
  3. Step 3: Cross multiply
    76,612.13x = 114,918.19 × 21,208.13
  4. Step 4: Simplify right side
    76,612.13x = 2,437,199,912.88
  5. Step 5: Solve for x
    x = 2,437,199,912.88/76,612.13
  6. Step 6: Final answer
    x = 31,812.19

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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.