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Finding the Fourth Proportional to 91,181.50, 125,831.81 and 50,898.31

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Solution

The fourth proportional to 91,181.50, 125,831.81 and 50,898.31 is: 70,240.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    91,181.50 : 125,831.81 = 50,898.31 : x
  2. Step 2: Convert to fraction form
    91,181.50/125,831.81 = 50,898.31/x
  3. Step 3: Cross multiply
    91,181.50x = 125,831.81 × 50,898.31
  4. Step 4: Simplify right side
    91,181.50x = 6,404,626,285.91
  5. Step 5: Solve for x
    x = 6,404,626,285.91/91,181.50
  6. Step 6: Final answer
    x = 70,240.42

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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.