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Finding the Fourth Proportional to 73,140.40, 109,710.60 and 43,591.60

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Solution

The fourth proportional to 73,140.40, 109,710.60 and 43,591.60 is: 65,387.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    73,140.40 : 109,710.60 = 43,591.60 : x
  2. Step 2: Convert to fraction form
    73,140.40/109,710.60 = 43,591.60/x
  3. Step 3: Cross multiply
    73,140.40x = 109,710.60 × 43,591.60
  4. Step 4: Simplify right side
    73,140.40x = 4,782,460,590.96
  5. Step 5: Solve for x
    x = 4,782,460,590.96/73,140.40
  6. Step 6: Final answer
    x = 65,387.40

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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.