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Finding the Fourth Proportional to 139,395.69, 192,365.55 and 75,732.93

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Solution

The fourth proportional to 139,395.69, 192,365.55 and 75,732.93 is: 104,511.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,395.69 : 192,365.55 = 75,732.93 : x
  2. Step 2: Convert to fraction form
    139,395.69/192,365.55 = 75,732.93/x
  3. Step 3: Cross multiply
    139,395.69x = 192,365.55 × 75,732.93
  4. Step 4: Simplify right side
    139,395.69x = 14,568,406,732.56
  5. Step 5: Solve for x
    x = 14,568,406,732.56/139,395.69
  6. Step 6: Final answer
    x = 104,511.17

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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.