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Finding the Fourth Proportional to 258,611.45, 356,852.46 and 143,862.98

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Solution

The fourth proportional to 258,611.45, 356,852.46 and 143,862.98 is: 198,513.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    258,611.45 : 356,852.46 = 143,862.98 : x
  2. Step 2: Convert to fraction form
    258,611.45/356,852.46 = 143,862.98/x
  3. Step 3: Cross multiply
    258,611.45x = 356,852.46 × 143,862.98
  4. Step 4: Simplify right side
    258,611.45x = 51,337,856,531.67
  5. Step 5: Solve for x
    x = 51,337,856,531.67/258,611.45
  6. Step 6: Final answer
    x = 198,513.47

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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.