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Finding the Fourth Proportional to 105,097.78, 145,034.88 and 67,372

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Solution

The fourth proportional to 105,097.78, 145,034.88 and 67,372 is: 92,973.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    105,097.78 : 145,034.88 = 67,372 : x
  2. Step 2: Convert to fraction form
    105,097.78/145,034.88 = 67,372/x
  3. Step 3: Cross multiply
    105,097.78x = 145,034.88 × 67,372
  4. Step 4: Simplify right side
    105,097.78x = 9,771,289,935.36
  5. Step 5: Solve for x
    x = 9,771,289,935.36/105,097.78
  6. Step 6: Final answer
    x = 92,973.32

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These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.