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Finding the Fourth Proportional to 103,699.40, 155,549.10 and 28,819.40

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Solution

The fourth proportional to 103,699.40, 155,549.10 and 28,819.40 is: 43,229.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    103,699.40 : 155,549.10 = 28,819.40 : x
  2. Step 2: Convert to fraction form
    103,699.40/155,549.10 = 28,819.40/x
  3. Step 3: Cross multiply
    103,699.40x = 155,549.10 × 28,819.40
  4. Step 4: Simplify right side
    103,699.40x = 4,482,831,732.54
  5. Step 5: Solve for x
    x = 4,482,831,732.54/103,699.40
  6. Step 6: Final answer
    x = 43,229.10

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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.