Home / 309,911.51-427,681.05-173,942.73

Finding the Fourth Proportional to 309,911.51, 427,681.05 and 173,942.73

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Solution

The fourth proportional to 309,911.51, 427,681.05 and 173,942.73 is: 240,042.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    309,911.51 : 427,681.05 = 173,942.73 : x
  2. Step 2: Convert to fraction form
    309,911.51/427,681.05 = 173,942.73/x
  3. Step 3: Cross multiply
    309,911.51x = 427,681.05 × 173,942.73
  4. Step 4: Simplify right side
    309,911.51x = 74,392,009,406.27
  5. Step 5: Solve for x
    x = 74,392,009,406.27/309,911.51
  6. Step 6: Final answer
    x = 240,042.75

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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.