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Finding the Fourth Proportional to 64,403.60, 96,475.80 and 43,408.40

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Solution

The fourth proportional to 64,403.60, 96,475.80 and 43,408.40 is: 65,025.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    64,403.60 : 96,475.80 = 43,408.40 : x
  2. Step 2: Convert to fraction form
    64,403.60/96,475.80 = 43,408.40/x
  3. Step 3: Cross multiply
    64,403.60x = 96,475.80 × 43,408.40
  4. Step 4: Simplify right side
    64,403.60x = 4,187,860,116.72
  5. Step 5: Solve for x
    x = 4,187,860,116.72/64,403.60
  6. Step 6: Final answer
    x = 65,025.25

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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.