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Finding the Fourth Proportional to 220,169,709.80, 330,254,564.70 and 66,815,520.20

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Solution

The fourth proportional to 220,169,709.80, 330,254,564.70 and 66,815,520.20 is: 100,223,280.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    220,169,709.80 : 330,254,564.70 = 66,815,520.20 : x
  2. Step 2: Convert to fraction form
    220,169,709.80/330,254,564.70 = 66,815,520.20/x
  3. Step 3: Cross multiply
    220,169,709.80x = 330,254,564.70 × 66,815,520.20
  4. Step 4: Simplify right side
    220,169,709.80x = 22,066,130,538,855,056
  5. Step 5: Solve for x
    x = 22,066,130,538,855,056/220,169,709.80
  6. Step 6: Final answer
    x = 100,223,280.30

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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.