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Finding the Fourth Proportional to 72,810.70, 109,216.09 and 20,220.18

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Solution

The fourth proportional to 72,810.70, 109,216.09 and 20,220.18 is: 30,330.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,810.70 : 109,216.09 = 20,220.18 : x
  2. Step 2: Convert to fraction form
    72,810.70/109,216.09 = 20,220.18/x
  3. Step 3: Cross multiply
    72,810.70x = 109,216.09 × 20,220.18
  4. Step 4: Simplify right side
    72,810.70x = 2,208,368,998.70
  5. Step 5: Solve for x
    x = 2,208,368,998.70/72,810.70
  6. Step 6: Final answer
    x = 30,330.28

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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.