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Finding the Fourth Proportional to 76,069.71, 104,968.11 and 42,072.79

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Solution

The fourth proportional to 76,069.71, 104,968.11 and 42,072.79 is: 58,055.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    76,069.71 : 104,968.11 = 42,072.79 : x
  2. Step 2: Convert to fraction form
    76,069.71/104,968.11 = 42,072.79/x
  3. Step 3: Cross multiply
    76,069.71x = 104,968.11 × 42,072.79
  4. Step 4: Simplify right side
    76,069.71x = 4,416,301,248.73
  5. Step 5: Solve for x
    x = 4,416,301,248.73/76,069.71
  6. Step 6: Final answer
    x = 58,055.98

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Why These Related Problems?

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