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Finding the Fourth Proportional to 115,879.38, 159,915.81 and 75,618.90

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Solution

The fourth proportional to 115,879.38, 159,915.81 and 75,618.90 is: 104,355.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    115,879.38 : 159,915.81 = 75,618.90 : x
  2. Step 2: Convert to fraction form
    115,879.38/159,915.81 = 75,618.90/x
  3. Step 3: Cross multiply
    115,879.38x = 159,915.81 × 75,618.90
  4. Step 4: Simplify right side
    115,879.38x = 12,092,657,644.81
  5. Step 5: Solve for x
    x = 12,092,657,644.81/115,879.38
  6. Step 6: Final answer
    x = 104,355.56

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1.5x scale

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.