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Finding the Fourth Proportional to 99,771.95, 149,657.90 and 66,556.86

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Solution

The fourth proportional to 99,771.95, 149,657.90 and 66,556.86 is: 99,835.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    99,771.95 : 149,657.90 = 66,556.86 : x
  2. Step 2: Convert to fraction form
    99,771.95/149,657.90 = 66,556.86/x
  3. Step 3: Cross multiply
    99,771.95x = 149,657.90 × 66,556.86
  4. Step 4: Simplify right side
    99,771.95x = 9,960,759,565.41
  5. Step 5: Solve for x
    x = 9,960,759,565.41/99,771.95
  6. Step 6: Final answer
    x = 99,835.27

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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.