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Finding the Fourth Proportional to 65,739.60, 90,622.80 and 46,591.20

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Solution

The fourth proportional to 65,739.60, 90,622.80 and 46,591.20 is: 64,226.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    65,739.60 : 90,622.80 = 46,591.20 : x
  2. Step 2: Convert to fraction form
    65,739.60/90,622.80 = 46,591.20/x
  3. Step 3: Cross multiply
    65,739.60x = 90,622.80 × 46,591.20
  4. Step 4: Simplify right side
    65,739.60x = 4,222,224,999.36
  5. Step 5: Solve for x
    x = 4,222,224,999.36/65,739.60
  6. Step 6: Final answer
    x = 64,226.51

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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.