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Finding the Fourth Proportional to 70,020.40, 104,987.40 and 40,423.60

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Solution

The fourth proportional to 70,020.40, 104,987.40 and 40,423.60 is: 60,610.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    70,020.40 : 104,987.40 = 40,423.60 : x
  2. Step 2: Convert to fraction form
    70,020.40/104,987.40 = 40,423.60/x
  3. Step 3: Cross multiply
    70,020.40x = 104,987.40 × 40,423.60
  4. Step 4: Simplify right side
    70,020.40x = 4,243,968,662.64
  5. Step 5: Solve for x
    x = 4,243,968,662.64/70,020.40
  6. Step 6: Final answer
    x = 60,610.46

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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.