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Finding the Fourth Proportional to 70,627.86, 105,940.40 and 28,506.82

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Solution

The fourth proportional to 70,627.86, 105,940.40 and 28,506.82 is: 42,759.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    70,627.86 : 105,940.40 = 28,506.82 : x
  2. Step 2: Convert to fraction form
    70,627.86/105,940.40 = 28,506.82/x
  3. Step 3: Cross multiply
    70,627.86x = 105,940.40 × 28,506.82
  4. Step 4: Simplify right side
    70,627.86x = 3,020,023,913.53
  5. Step 5: Solve for x
    x = 3,020,023,913.53/70,627.86
  6. Step 6: Final answer
    x = 42,759.67

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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.