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Finding the Fourth Proportional to 139,998.68, 210,009.90 and 51,230.80

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Solution

The fourth proportional to 139,998.68, 210,009.90 and 51,230.80 is: 76,850.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,998.68 : 210,009.90 = 51,230.80 : x
  2. Step 2: Convert to fraction form
    139,998.68/210,009.90 = 51,230.80/x
  3. Step 3: Cross multiply
    139,998.68x = 210,009.90 × 51,230.80
  4. Step 4: Simplify right side
    139,998.68x = 10,758,975,184.92
  5. Step 5: Solve for x
    x = 10,758,975,184.92/139,998.68
  6. Step 6: Final answer
    x = 76,850.55

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1.5x scale

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.