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Finding the Fourth Proportional to 71,645.95, 107,468.79 and 19,055.49

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Solution

The fourth proportional to 71,645.95, 107,468.79 and 19,055.49 is: 28,583.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    71,645.95 : 107,468.79 = 19,055.49 : x
  2. Step 2: Convert to fraction form
    71,645.95/107,468.79 = 19,055.49/x
  3. Step 3: Cross multiply
    71,645.95x = 107,468.79 × 19,055.49
  4. Step 4: Simplify right side
    71,645.95x = 2,047,870,453.16
  5. Step 5: Solve for x
    x = 2,047,870,453.16/71,645.95
  6. Step 6: Final answer
    x = 28,583.20

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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.