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Finding the Fourth Proportional to 76,672.20, 115,008.30 and 21,268.20

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Solution

The fourth proportional to 76,672.20, 115,008.30 and 21,268.20 is: 31,902.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    76,672.20 : 115,008.30 = 21,268.20 : x
  2. Step 2: Convert to fraction form
    76,672.20/115,008.30 = 21,268.20/x
  3. Step 3: Cross multiply
    76,672.20x = 115,008.30 × 21,268.20
  4. Step 4: Simplify right side
    76,672.20x = 2,446,019,526.06
  5. Step 5: Solve for x
    x = 2,446,019,526.06/76,672.20
  6. Step 6: Final answer
    x = 31,902.30

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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.