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Finding the Fourth Proportional to 70,246.73, 105,425.45 and 30,831.05

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Solution

The fourth proportional to 70,246.73, 105,425.45 and 30,831.05 is: 46,270.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    70,246.73 : 105,425.45 = 30,831.05 : x
  2. Step 2: Convert to fraction form
    70,246.73/105,425.45 = 30,831.05/x
  3. Step 3: Cross multiply
    70,246.73x = 105,425.45 × 30,831.05
  4. Step 4: Simplify right side
    70,246.73x = 3,250,377,320.22
  5. Step 5: Solve for x
    x = 3,250,377,320.22/70,246.73
  6. Step 6: Final answer
    x = 46,270.87

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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.