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Finding the Fourth Proportional to 64,400.60, 96,471.30 and 43,405.40

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Solution

The fourth proportional to 64,400.60, 96,471.30 and 43,405.40 is: 65,020.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    64,400.60 : 96,471.30 = 43,405.40 : x
  2. Step 2: Convert to fraction form
    64,400.60/96,471.30 = 43,405.40/x
  3. Step 3: Cross multiply
    64,400.60x = 96,471.30 × 43,405.40
  4. Step 4: Simplify right side
    64,400.60x = 4,187,375,365.02
  5. Step 5: Solve for x
    x = 4,187,375,365.02/64,400.60
  6. Step 6: Final answer
    x = 65,020.75

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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.