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Finding the Fourth Proportional to 71,561.83, 107,330.59 and 18,976.63

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Solution

The fourth proportional to 71,561.83, 107,330.59 and 18,976.63 is: 28,461.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    71,561.83 : 107,330.59 = 18,976.63 : x
  2. Step 2: Convert to fraction form
    71,561.83/107,330.59 = 18,976.63/x
  3. Step 3: Cross multiply
    71,561.83x = 107,330.59 × 18,976.63
  4. Step 4: Simplify right side
    71,561.83x = 2,036,772,904.12
  5. Step 5: Solve for x
    x = 2,036,772,904.12/71,561.83
  6. Step 6: Final answer
    x = 28,461.72

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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.