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Finding the Fourth Proportional to 69,258.90, 103,629.15 and 45,930.90

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Solution

The fourth proportional to 69,258.90, 103,629.15 and 45,930.90 is: 68,724.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    69,258.90 : 103,629.15 = 45,930.90 : x
  2. Step 2: Convert to fraction form
    69,258.90/103,629.15 = 45,930.90/x
  3. Step 3: Cross multiply
    69,258.90x = 103,629.15 × 45,930.90
  4. Step 4: Simplify right side
    69,258.90x = 4,759,780,125.74
  5. Step 5: Solve for x
    x = 4,759,780,125.74/69,258.90
  6. Step 6: Final answer
    x = 68,724.45

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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.