Home / 257,904.23-386,911.62-77,974.27

Finding the Fourth Proportional to 257,904.23, 386,911.62 and 77,974.27

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Solution

The fourth proportional to 257,904.23, 386,911.62 and 77,974.27 is: 116,978.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    257,904.23 : 386,911.62 = 77,974.27 : x
  2. Step 2: Convert to fraction form
    257,904.23/386,911.62 = 77,974.27/x
  3. Step 3: Cross multiply
    257,904.23x = 386,911.62 × 77,974.27
  4. Step 4: Simplify right side
    257,904.23x = 30,169,150,156.74
  5. Step 5: Solve for x
    x = 30,169,150,156.74/257,904.23
  6. Step 6: Final answer
    x = 116,978.12

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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.