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Finding the Fourth Proportional to 43,881.20, 65,746.20 and 20,459.60

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Solution

The fourth proportional to 43,881.20, 65,746.20 and 20,459.60 is: 30,654.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    43,881.20 : 65,746.20 = 20,459.60 : x
  2. Step 2: Convert to fraction form
    43,881.20/65,746.20 = 20,459.60/x
  3. Step 3: Cross multiply
    43,881.20x = 65,746.20 × 20,459.60
  4. Step 4: Simplify right side
    43,881.20x = 1,345,140,953.52
  5. Step 5: Solve for x
    x = 1,345,140,953.52/43,881.20
  6. Step 6: Final answer
    x = 30,654.15

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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.