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Finding the Fourth Proportional to 70,391.60, 105,601.17 and 30,948.59

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Solution

The fourth proportional to 70,391.60, 105,601.17 and 30,948.59 is: 46,428.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    70,391.60 : 105,601.17 = 30,948.59 : x
  2. Step 2: Convert to fraction form
    70,391.60/105,601.17 = 30,948.59/x
  3. Step 3: Cross multiply
    70,391.60x = 105,601.17 × 30,948.59
  4. Step 4: Simplify right side
    70,391.60x = 3,268,206,785.84
  5. Step 5: Solve for x
    x = 3,268,206,785.84/70,391.60
  6. Step 6: Final answer
    x = 46,428.93

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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.