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Finding the Fourth Proportional to 117,840.43, 162,623.21 and 64,128.91

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Solution

The fourth proportional to 117,840.43, 162,623.21 and 64,128.91 is: 88,499.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    117,840.43 : 162,623.21 = 64,128.91 : x
  2. Step 2: Convert to fraction form
    117,840.43/162,623.21 = 64,128.91/x
  3. Step 3: Cross multiply
    117,840.43x = 162,623.21 × 64,128.91
  4. Step 4: Simplify right side
    117,840.43x = 10,428,848,064.24
  5. Step 5: Solve for x
    x = 10,428,848,064.24/117,840.43
  6. Step 6: Final answer
    x = 88,499.75

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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.