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Finding the Fourth Proportional to 78,541.73, 117,886.41 and 41,128.66

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Solution

The fourth proportional to 78,541.73, 117,886.41 and 41,128.66 is: 61,731.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,541.73 : 117,886.41 = 41,128.66 : x
  2. Step 2: Convert to fraction form
    78,541.73/117,886.41 = 41,128.66/x
  3. Step 3: Cross multiply
    78,541.73x = 117,886.41 × 41,128.66
  4. Step 4: Simplify right side
    78,541.73x = 4,848,509,559.76
  5. Step 5: Solve for x
    x = 4,848,509,559.76/78,541.73
  6. Step 6: Final answer
    x = 61,731.63

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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.