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Finding the Fourth Proportional to 66,928.32, 100,258.64 and 40,259.58

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Solution

The fourth proportional to 66,928.32, 100,258.64 and 40,259.58 is: 60,308.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,928.32 : 100,258.64 = 40,259.58 : x
  2. Step 2: Convert to fraction form
    66,928.32/100,258.64 = 40,259.58/x
  3. Step 3: Cross multiply
    66,928.32x = 100,258.64 × 40,259.58
  4. Step 4: Simplify right side
    66,928.32x = 4,036,370,737.77
  5. Step 5: Solve for x
    x = 4,036,370,737.77/66,928.32
  6. Step 6: Final answer
    x = 60,308.86

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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.