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Finding the Fourth Proportional to 64,239.60, 96,445.80 and 40,911.60

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Solution

The fourth proportional to 64,239.60, 96,445.80 and 40,911.60 is: 61,422.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    64,239.60 : 96,445.80 = 40,911.60 : x
  2. Step 2: Convert to fraction form
    64,239.60/96,445.80 = 40,911.60/x
  3. Step 3: Cross multiply
    64,239.60x = 96,445.80 × 40,911.60
  4. Step 4: Simplify right side
    64,239.60x = 3,945,751,991.28
  5. Step 5: Solve for x
    x = 3,945,751,991.28/64,239.60
  6. Step 6: Final answer
    x = 61,422.42

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1.5x scale

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.