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Finding the Fourth Proportional to 78,008.84, 107,664.90 and 57,998.60

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Solution

The fourth proportional to 78,008.84, 107,664.90 and 57,998.60 is: 80,047.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,008.84 : 107,664.90 = 57,998.60 : x
  2. Step 2: Convert to fraction form
    78,008.84/107,664.90 = 57,998.60/x
  3. Step 3: Cross multiply
    78,008.84x = 107,664.90 × 57,998.60
  4. Step 4: Simplify right side
    78,008.84x = 6,244,413,469.14
  5. Step 5: Solve for x
    x = 6,244,413,469.14/78,008.84
  6. Step 6: Final answer
    x = 80,047.51

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.