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Finding the Fourth Proportional to 103,699.17, 155,548.65 and 28,819.28

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Solution

The fourth proportional to 103,699.17, 155,548.65 and 28,819.28 is: 43,228.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    103,699.17 : 155,548.65 = 28,819.28 : x
  2. Step 2: Convert to fraction form
    103,699.17/155,548.65 = 28,819.28/x
  3. Step 3: Cross multiply
    103,699.17x = 155,548.65 × 28,819.28
  4. Step 4: Simplify right side
    103,699.17x = 4,482,800,097.97
  5. Step 5: Solve for x
    x = 4,482,800,097.97/103,699.17
  6. Step 6: Final answer
    x = 43,228.89

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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.