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Finding the Fourth Proportional to 315,158.80, 434,903.16 and 171,917.68

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Solution

The fourth proportional to 315,158.80, 434,903.16 and 171,917.68 is: 237,237.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    315,158.80 : 434,903.16 = 171,917.68 : x
  2. Step 2: Convert to fraction form
    315,158.80/434,903.16 = 171,917.68/x
  3. Step 3: Cross multiply
    315,158.80x = 434,903.16 × 171,917.68
  4. Step 4: Simplify right side
    315,158.80x = 74,767,542,291.87
  5. Step 5: Solve for x
    x = 74,767,542,291.87/315,158.80
  6. Step 6: Final answer
    x = 237,237.68

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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.