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Finding the Fourth Proportional to 103,554.63, 155,314.61 and 28,682.31

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Solution

The fourth proportional to 103,554.63, 155,314.61 and 28,682.31 is: 43,018.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    103,554.63 : 155,314.61 = 28,682.31 : x
  2. Step 2: Convert to fraction form
    103,554.63/155,314.61 = 28,682.31/x
  3. Step 3: Cross multiply
    103,554.63x = 155,314.61 × 28,682.31
  4. Step 4: Simplify right side
    103,554.63x = 4,454,781,648.14
  5. Step 5: Solve for x
    x = 4,454,781,648.14/103,554.63
  6. Step 6: Final answer
    x = 43,018.66

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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.