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Finding the Fourth Proportional to 155,064.96, 213,989.04 and 87,072.48

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Solution

The fourth proportional to 155,064.96, 213,989.04 and 87,072.48 is: 120,159.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    155,064.96 : 213,989.04 = 87,072.48 : x
  2. Step 2: Convert to fraction form
    155,064.96/213,989.04 = 87,072.48/x
  3. Step 3: Cross multiply
    155,064.96x = 213,989.04 × 87,072.48
  4. Step 4: Simplify right side
    155,064.96x = 18,632,556,405.62
  5. Step 5: Solve for x
    x = 18,632,556,405.62/155,064.96
  6. Step 6: Final answer
    x = 120,159.68

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.