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Finding the Fourth Proportional to 139,419.05, 192,399.50 and 75,756.84

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Solution

The fourth proportional to 139,419.05, 192,399.50 and 75,756.84 is: 104,545.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,419.05 : 192,399.50 = 75,756.84 : x
  2. Step 2: Convert to fraction form
    139,419.05/192,399.50 = 75,756.84/x
  3. Step 3: Cross multiply
    139,419.05x = 192,399.50 × 75,756.84
  4. Step 4: Simplify right side
    139,419.05x = 14,575,578,137.58
  5. Step 5: Solve for x
    x = 14,575,578,137.58/139,419.05
  6. Step 6: Final answer
    x = 104,545.10

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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.