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Finding the Fourth Proportional to 117,840.36, 162,623.12 and 64,128.84

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Solution

The fourth proportional to 117,840.36, 162,623.12 and 64,128.84 is: 88,499.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    117,840.36 : 162,623.12 = 64,128.84 : x
  2. Step 2: Convert to fraction form
    117,840.36/162,623.12 = 64,128.84/x
  3. Step 3: Cross multiply
    117,840.36x = 162,623.12 × 64,128.84
  4. Step 4: Simplify right side
    117,840.36x = 10,428,831,962.62
  5. Step 5: Solve for x
    x = 10,428,831,962.62/117,840.36
  6. Step 6: Final answer
    x = 88,499.66

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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.