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Finding the Fourth Proportional to 117,840.80, 162,623.72 and 64,129.28

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Solution

The fourth proportional to 117,840.80, 162,623.72 and 64,129.28 is: 88,500.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    117,840.80 : 162,623.72 = 64,129.28 : x
  2. Step 2: Convert to fraction form
    117,840.80/162,623.72 = 64,129.28/x
  3. Step 3: Cross multiply
    117,840.80x = 162,623.72 × 64,129.28
  4. Step 4: Simplify right side
    117,840.80x = 10,428,942,074.52
  5. Step 5: Solve for x
    x = 10,428,942,074.52/117,840.80
  6. Step 6: Final answer
    x = 88,500.27

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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.