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Finding the Fourth Proportional to 71,720.44, 107,580.66 and 19,130.14

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Solution

The fourth proportional to 71,720.44, 107,580.66 and 19,130.14 is: 28,695.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    71,720.44 : 107,580.66 = 19,130.14 : x
  2. Step 2: Convert to fraction form
    71,720.44/107,580.66 = 19,130.14/x
  3. Step 3: Cross multiply
    71,720.44x = 107,580.66 × 19,130.14
  4. Step 4: Simplify right side
    71,720.44x = 2,058,033,087.09
  5. Step 5: Solve for x
    x = 2,058,033,087.09/71,720.44
  6. Step 6: Final answer
    x = 28,695.21

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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.