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Finding the Fourth Proportional to 139,188.78, 192,074.90 and 75,525.21

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Solution

The fourth proportional to 139,188.78, 192,074.90 and 75,525.21 is: 104,221.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,188.78 : 192,074.90 = 75,525.21 : x
  2. Step 2: Convert to fraction form
    139,188.78/192,074.90 = 75,525.21/x
  3. Step 3: Cross multiply
    139,188.78x = 192,074.90 × 75,525.21
  4. Step 4: Simplify right side
    139,188.78x = 14,506,496,780.60
  5. Step 5: Solve for x
    x = 14,506,496,780.60/139,188.78
  6. Step 6: Final answer
    x = 104,221.74

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.