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Finding the Fourth Proportional to 71,670.34, 107,507.40 and 19,079.92

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Solution

The fourth proportional to 71,670.34, 107,507.40 and 19,079.92 is: 28,620.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    71,670.34 : 107,507.40 = 19,079.92 : x
  2. Step 2: Convert to fraction form
    71,670.34/107,507.40 = 19,079.92/x
  3. Step 3: Cross multiply
    71,670.34x = 107,507.40 × 19,079.92
  4. Step 4: Simplify right side
    71,670.34x = 2,051,232,591.41
  5. Step 5: Solve for x
    x = 2,051,232,591.41/71,670.34
  6. Step 6: Final answer
    x = 28,620.38

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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.