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Finding the Fourth Proportional to 76,810.05, 115,214.96 and 21,406.05

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Solution

The fourth proportional to 76,810.05, 115,214.96 and 21,406.05 is: 32,109.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    76,810.05 : 115,214.96 = 21,406.05 : x
  2. Step 2: Convert to fraction form
    76,810.05/115,214.96 = 21,406.05/x
  3. Step 3: Cross multiply
    76,810.05x = 115,214.96 × 21,406.05
  4. Step 4: Simplify right side
    76,810.05x = 2,466,297,087.48
  5. Step 5: Solve for x
    x = 2,466,297,087.48/76,810.05
  6. Step 6: Final answer
    x = 32,109.04

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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.