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Finding the Fourth Proportional to 102,519, 153,778.50 and 28,647

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Solution

The fourth proportional to 102,519, 153,778.50 and 28,647 is: 42,970.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    102,519 : 153,778.50 = 28,647 : x
  2. Step 2: Convert to fraction form
    102,519/153,778.50 = 28,647/x
  3. Step 3: Cross multiply
    102,519x = 153,778.50 × 28,647
  4. Step 4: Simplify right side
    102,519x = 4,405,292,689.50
  5. Step 5: Solve for x
    x = 4,405,292,689.50/102,519
  6. Step 6: Final answer
    x = 42,970.50

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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.