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Finding the Fourth Proportional to 28,419,101.70, 42,628,652.55 and 28,419,101.70

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Solution

The fourth proportional to 28,419,101.70, 42,628,652.55 and 28,419,101.70 is: 42,628,652.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,419,101.70 : 42,628,652.55 = 28,419,101.70 : x
  2. Step 2: Convert to fraction form
    28,419,101.70/42,628,652.55 = 28,419,101.70/x
  3. Step 3: Cross multiply
    28,419,101.70x = 42,628,652.55 × 28,419,101.70
  4. Step 4: Simplify right side
    28,419,101.70x = 1,211,468,012,152,414.25
  5. Step 5: Solve for x
    x = 1,211,468,012,152,414.25/28,419,101.70
  6. Step 6: Final answer
    x = 42,628,652.55

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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.