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Finding the Fourth Proportional to 115,879.70, 159,916.43 and 70,559.60

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Solution

The fourth proportional to 115,879.70, 159,916.43 and 70,559.60 is: 97,373.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    115,879.70 : 159,916.43 = 70,559.60 : x
  2. Step 2: Convert to fraction form
    115,879.70/159,916.43 = 70,559.60/x
  3. Step 3: Cross multiply
    115,879.70x = 159,916.43 × 70,559.60
  4. Step 4: Simplify right side
    115,879.70x = 11,283,638,181.85
  5. Step 5: Solve for x
    x = 11,283,638,181.85/115,879.70
  6. Step 6: Final answer
    x = 97,373.73

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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.