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Finding the Fourth Proportional to 68,978.62, 103,394.36 and 39,332.62

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Solution

The fourth proportional to 68,978.62, 103,394.36 and 39,332.62 is: 58,956.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    68,978.62 : 103,394.36 = 39,332.62 : x
  2. Step 2: Convert to fraction form
    68,978.62/103,394.36 = 39,332.62/x
  3. Step 3: Cross multiply
    68,978.62x = 103,394.36 × 39,332.62
  4. Step 4: Simplify right side
    68,978.62x = 4,066,771,072.02
  5. Step 5: Solve for x
    x = 4,066,771,072.02/68,978.62
  6. Step 6: Final answer
    x = 58,956.98

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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.