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Finding the Fourth Proportional to 70,258.26, 105,374.50 and 20,326.08

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Solution

The fourth proportional to 70,258.26, 105,374.50 and 20,326.08 is: 30,485.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    70,258.26 : 105,374.50 = 20,326.08 : x
  2. Step 2: Convert to fraction form
    70,258.26/105,374.50 = 20,326.08/x
  3. Step 3: Cross multiply
    70,258.26x = 105,374.50 × 20,326.08
  4. Step 4: Simplify right side
    70,258.26x = 2,141,850,516.96
  5. Step 5: Solve for x
    x = 2,141,850,516.96/70,258.26
  6. Step 6: Final answer
    x = 30,485.39

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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.