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Finding the Fourth Proportional to 170,831.30, 256,246.95 and 76,061.30

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Solution

The fourth proportional to 170,831.30, 256,246.95 and 76,061.30 is: 114,091.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    170,831.30 : 256,246.95 = 76,061.30 : x
  2. Step 2: Convert to fraction form
    170,831.30/256,246.95 = 76,061.30/x
  3. Step 3: Cross multiply
    170,831.30x = 256,246.95 × 76,061.30
  4. Step 4: Simplify right side
    170,831.30x = 19,490,476,138.04
  5. Step 5: Solve for x
    x = 19,490,476,138.04/170,831.30
  6. Step 6: Final answer
    x = 114,091.95

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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.