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Finding the Fourth Proportional to 70,391.85, 105,601.56 and 30,948.85

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Solution

The fourth proportional to 70,391.85, 105,601.56 and 30,948.85 is: 46,429.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    70,391.85 : 105,601.56 = 30,948.85 : x
  2. Step 2: Convert to fraction form
    70,391.85/105,601.56 = 30,948.85/x
  3. Step 3: Cross multiply
    70,391.85x = 105,601.56 × 30,948.85
  4. Step 4: Simplify right side
    70,391.85x = 3,268,246,840.21
  5. Step 5: Solve for x
    x = 3,268,246,840.21/70,391.85
  6. Step 6: Final answer
    x = 46,429.34

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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.