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Finding the Fourth Proportional to 64,388.40, 96,611.40 and 31,095.60

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Solution

The fourth proportional to 64,388.40, 96,611.40 and 31,095.60 is: 46,657.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    64,388.40 : 96,611.40 = 31,095.60 : x
  2. Step 2: Convert to fraction form
    64,388.40/96,611.40 = 31,095.60/x
  3. Step 3: Cross multiply
    64,388.40x = 96,611.40 × 31,095.60
  4. Step 4: Simplify right side
    64,388.40x = 3,004,189,449.84
  5. Step 5: Solve for x
    x = 3,004,189,449.84/64,388.40
  6. Step 6: Final answer
    x = 46,657.31

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.