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Finding the Fourth Proportional to 66,106, 99,139.56 and 19,347.76

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Solution

The fourth proportional to 66,106, 99,139.56 and 19,347.76 is: 29,015.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,106 : 99,139.56 = 19,347.76 : x
  2. Step 2: Convert to fraction form
    66,106/99,139.56 = 19,347.76/x
  3. Step 3: Cross multiply
    66,106x = 99,139.56 × 19,347.76
  4. Step 4: Simplify right side
    66,106x = 1,918,128,413.39
  5. Step 5: Solve for x
    x = 1,918,128,413.39/66,106
  6. Step 6: Final answer
    x = 29,015.95

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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.