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Finding the Fourth Proportional to 112,879.60, 169,709.80 and 105,570.80

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Solution

The fourth proportional to 112,879.60, 169,709.80 and 105,570.80 is: 158,721.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    112,879.60 : 169,709.80 = 105,570.80 : x
  2. Step 2: Convert to fraction form
    112,879.60/169,709.80 = 105,570.80/x
  3. Step 3: Cross multiply
    112,879.60x = 169,709.80 × 105,570.80
  4. Step 4: Simplify right side
    112,879.60x = 17,916,399,353.84
  5. Step 5: Solve for x
    x = 17,916,399,353.84/112,879.60
  6. Step 6: Final answer
    x = 158,721.32

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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.