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Finding the Fourth Proportional to 315,367.07, 435,203.42 and 172,125.86

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Solution

The fourth proportional to 315,367.07, 435,203.42 and 172,125.86 is: 237,531.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    315,367.07 : 435,203.42 = 172,125.86 : x
  2. Step 2: Convert to fraction form
    315,367.07/435,203.42 = 172,125.86/x
  3. Step 3: Cross multiply
    315,367.07x = 435,203.42 × 172,125.86
  4. Step 4: Simplify right side
    315,367.07x = 74,909,759,905.79
  5. Step 5: Solve for x
    x = 74,909,759,905.79/315,367.07
  6. Step 6: Final answer
    x = 237,531.97

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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.