Home / 75,678.78-104,438.79-42,146.94

Finding the Fourth Proportional to 75,678.78, 104,438.79 and 42,146.94

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Solution

The fourth proportional to 75,678.78, 104,438.79 and 42,146.94 is: 58,163.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    75,678.78 : 104,438.79 = 42,146.94 : x
  2. Step 2: Convert to fraction form
    75,678.78/104,438.79 = 42,146.94/x
  3. Step 3: Cross multiply
    75,678.78x = 104,438.79 × 42,146.94
  4. Step 4: Simplify right side
    75,678.78x = 4,401,775,415.80
  5. Step 5: Solve for x
    x = 4,401,775,415.80/75,678.78
  6. Step 6: Final answer
    x = 58,163.93

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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.