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Finding the Fourth Proportional to 72,078.15, 108,116.97 and 19,487.63

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Solution

The fourth proportional to 72,078.15, 108,116.97 and 19,487.63 is: 29,231.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,078.15 : 108,116.97 = 19,487.63 : x
  2. Step 2: Convert to fraction form
    72,078.15/108,116.97 = 19,487.63/x
  3. Step 3: Cross multiply
    72,078.15x = 108,116.97 × 19,487.63
  4. Step 4: Simplify right side
    72,078.15x = 2,106,942,967.50
  5. Step 5: Solve for x
    x = 2,106,942,967.50/72,078.15
  6. Step 6: Final answer
    x = 29,231.37

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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.