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Finding the Fourth Proportional to 72,730.63, 109,083.57 and 20,127.79

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Solution

The fourth proportional to 72,730.63, 109,083.57 and 20,127.79 is: 30,188.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,730.63 : 109,083.57 = 20,127.79 : x
  2. Step 2: Convert to fraction form
    72,730.63/109,083.57 = 20,127.79/x
  3. Step 3: Cross multiply
    72,730.63x = 109,083.57 × 20,127.79
  4. Step 4: Simplify right side
    72,730.63x = 2,195,611,189.41
  5. Step 5: Solve for x
    x = 2,195,611,189.41/72,730.63
  6. Step 6: Final answer
    x = 30,188.26

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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.