Home / 117,904-162,845.76-78,090.88

Finding the Fourth Proportional to 117,904, 162,845.76 and 78,090.88

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Solution

The fourth proportional to 117,904, 162,845.76 and 78,090.88 is: 107,856.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    117,904 : 162,845.76 = 78,090.88 : x
  2. Step 2: Convert to fraction form
    117,904/162,845.76 = 78,090.88/x
  3. Step 3: Cross multiply
    117,904x = 162,845.76 × 78,090.88
  4. Step 4: Simplify right side
    117,904x = 12,716,768,702.67
  5. Step 5: Solve for x
    x = 12,716,768,702.67/117,904
  6. Step 6: Final answer
    x = 107,856.97

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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.