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Finding the Fourth Proportional to 71,808.61, 107,712.91 and 19,216.73

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Solution

The fourth proportional to 71,808.61, 107,712.91 and 19,216.73 is: 28,825.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    71,808.61 : 107,712.91 = 19,216.73 : x
  2. Step 2: Convert to fraction form
    71,808.61/107,712.91 = 19,216.73/x
  3. Step 3: Cross multiply
    71,808.61x = 107,712.91 × 19,216.73
  4. Step 4: Simplify right side
    71,808.61x = 2,069,889,650.45
  5. Step 5: Solve for x
    x = 2,069,889,650.45/71,808.61
  6. Step 6: Final answer
    x = 28,825.09

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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.