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Finding the Fourth Proportional to 315,272.10, 435,086.00 and 172,040.01

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Solution

The fourth proportional to 315,272.10, 435,086.00 and 172,040.01 is: 237,420.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    315,272.10 : 435,086.00 = 172,040.01 : x
  2. Step 2: Convert to fraction form
    315,272.10/435,086.00 = 172,040.01/x
  3. Step 3: Cross multiply
    315,272.10x = 435,086.00 × 172,040.01
  4. Step 4: Simplify right side
    315,272.10x = 74,852,198,930.66
  5. Step 5: Solve for x
    x = 74,852,198,930.66/315,272.10
  6. Step 6: Final answer
    x = 237,420.94

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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.