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Finding the Fourth Proportional to 148,958.40, 223,243.20 and 68,987.10

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Solution

The fourth proportional to 148,958.40, 223,243.20 and 68,987.10 is: 103,390.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    148,958.40 : 223,243.20 = 68,987.10 : x
  2. Step 2: Convert to fraction form
    148,958.40/223,243.20 = 68,987.10/x
  3. Step 3: Cross multiply
    148,958.40x = 223,243.20 × 68,987.10
  4. Step 4: Simplify right side
    148,958.40x = 15,400,900,962.72
  5. Step 5: Solve for x
    x = 15,400,900,962.72/148,958.40
  6. Step 6: Final answer
    x = 103,390.62

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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.