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Finding the Fourth Proportional to 74,392.70, 102,679.79 and 42,580.04

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Solution

The fourth proportional to 74,392.70, 102,679.79 and 42,580.04 is: 58,770.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    74,392.70 : 102,679.79 = 42,580.04 : x
  2. Step 2: Convert to fraction form
    74,392.70/102,679.79 = 42,580.04/x
  3. Step 3: Cross multiply
    74,392.70x = 102,679.79 × 42,580.04
  4. Step 4: Simplify right side
    74,392.70x = 4,372,108,839.09
  5. Step 5: Solve for x
    x = 4,372,108,839.09/74,392.70
  6. Step 6: Final answer
    x = 58,770.67

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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.