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Finding the Fourth Proportional to 79,010.40, 118,580.40 and 76,418.40

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Solution

The fourth proportional to 79,010.40, 118,580.40 and 76,418.40 is: 114,690.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    79,010.40 : 118,580.40 = 76,418.40 : x
  2. Step 2: Convert to fraction form
    79,010.40/118,580.40 = 76,418.40/x
  3. Step 3: Cross multiply
    79,010.40x = 118,580.40 × 76,418.40
  4. Step 4: Simplify right side
    79,010.40x = 9,061,724,439.36
  5. Step 5: Solve for x
    x = 9,061,724,439.36/79,010.40
  6. Step 6: Final answer
    x = 114,690.27

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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.