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Finding the Fourth Proportional to 61,005.60, 91,330.20 and 43,509.60

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Solution

The fourth proportional to 61,005.60, 91,330.20 and 43,509.60 is: 65,137.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    61,005.60 : 91,330.20 = 43,509.60 : x
  2. Step 2: Convert to fraction form
    61,005.60/91,330.20 = 43,509.60/x
  3. Step 3: Cross multiply
    61,005.60x = 91,330.20 × 43,509.60
  4. Step 4: Simplify right side
    61,005.60x = 3,973,740,469.92
  5. Step 5: Solve for x
    x = 3,973,740,469.92/61,005.60
  6. Step 6: Final answer
    x = 65,137.31

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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.