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Finding the Fourth Proportional to 71,800.75, 107,701.13 and 19,208.87

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Solution

The fourth proportional to 71,800.75, 107,701.13 and 19,208.87 is: 28,813.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    71,800.75 : 107,701.13 = 19,208.87 : x
  2. Step 2: Convert to fraction form
    71,800.75/107,701.13 = 19,208.87/x
  3. Step 3: Cross multiply
    71,800.75x = 107,701.13 × 19,208.87
  4. Step 4: Simplify right side
    71,800.75x = 2,068,817,005.02
  5. Step 5: Solve for x
    x = 2,068,817,005.02/71,800.75
  6. Step 6: Final answer
    x = 28,813.31

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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.