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Finding the Fourth Proportional to 228,412.78, 342,619.17 and 70,642.60

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Solution

The fourth proportional to 228,412.78, 342,619.17 and 70,642.60 is: 105,963.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    228,412.78 : 342,619.17 = 70,642.60 : x
  2. Step 2: Convert to fraction form
    228,412.78/342,619.17 = 70,642.60/x
  3. Step 3: Cross multiply
    228,412.78x = 342,619.17 × 70,642.60
  4. Step 4: Simplify right side
    228,412.78x = 24,203,508,978.64
  5. Step 5: Solve for x
    x = 24,203,508,978.64/228,412.78
  6. Step 6: Final answer
    x = 105,963.90

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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.