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Finding the Fourth Proportional to 151,957.73, 209,745.48 and 100,312.63

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Solution

The fourth proportional to 151,957.73, 209,745.48 and 100,312.63 is: 138,460.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    151,957.73 : 209,745.48 = 100,312.63 : x
  2. Step 2: Convert to fraction form
    151,957.73/209,745.48 = 100,312.63/x
  3. Step 3: Cross multiply
    151,957.73x = 209,745.48 × 100,312.63
  4. Step 4: Simplify right side
    151,957.73x = 21,040,120,729.41
  5. Step 5: Solve for x
    x = 21,040,120,729.41/151,957.73
  6. Step 6: Final answer
    x = 138,460.35

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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.