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Finding the Fourth Proportional to 118,009.58, 162,913.41 and 79,970.09

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Solution

The fourth proportional to 118,009.58, 162,913.41 and 79,970.09 is: 110,399.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    118,009.58 : 162,913.41 = 79,970.09 : x
  2. Step 2: Convert to fraction form
    118,009.58/162,913.41 = 79,970.09/x
  3. Step 3: Cross multiply
    118,009.58x = 162,913.41 × 79,970.09
  4. Step 4: Simplify right side
    118,009.58x = 13,028,199,245.34
  5. Step 5: Solve for x
    x = 13,028,199,245.34/118,009.58
  6. Step 6: Final answer
    x = 110,399.51

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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.