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Finding the Fourth Proportional to 117,695.44, 162,412.88 and 63,980

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Solution

The fourth proportional to 117,695.44, 162,412.88 and 63,980 is: 88,288.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    117,695.44 : 162,412.88 = 63,980 : x
  2. Step 2: Convert to fraction form
    117,695.44/162,412.88 = 63,980/x
  3. Step 3: Cross multiply
    117,695.44x = 162,412.88 × 63,980
  4. Step 4: Simplify right side
    117,695.44x = 10,391,176,062.40
  5. Step 5: Solve for x
    x = 10,391,176,062.40/117,695.44
  6. Step 6: Final answer
    x = 88,288.69

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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.