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Finding the Fourth Proportional to 66,742,601.70, 100,113,902.55 and 28,394,480.10

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Solution

The fourth proportional to 66,742,601.70, 100,113,902.55 and 28,394,480.10 is: 42,591,720.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,742,601.70 : 100,113,902.55 = 28,394,480.10 : x
  2. Step 2: Convert to fraction form
    66,742,601.70/100,113,902.55 = 28,394,480.10/x
  3. Step 3: Cross multiply
    66,742,601.70x = 100,113,902.55 × 28,394,480.10
  4. Step 4: Simplify right side
    66,742,601.70x = 2,842,682,213,689,314.50
  5. Step 5: Solve for x
    x = 2,842,682,213,689,314.50/66,742,601.70
  6. Step 6: Final answer
    x = 42,591,720.15

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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.