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Finding the Fourth Proportional to 76,611.44, 105,702.60 and 43,076.72

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Solution

The fourth proportional to 76,611.44, 105,702.60 and 43,076.72 is: 59,433.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    76,611.44 : 105,702.60 = 43,076.72 : x
  2. Step 2: Convert to fraction form
    76,611.44/105,702.60 = 43,076.72/x
  3. Step 3: Cross multiply
    76,611.44x = 105,702.60 × 43,076.72
  4. Step 4: Simplify right side
    76,611.44x = 4,553,321,303.47
  5. Step 5: Solve for x
    x = 4,553,321,303.47/76,611.44
  6. Step 6: Final answer
    x = 59,433.96

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.