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Finding the Fourth Proportional to 315,271.97, 435,085.82 and 172,039.87

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Solution

The fourth proportional to 315,271.97, 435,085.82 and 172,039.87 is: 237,420.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    315,271.97 : 435,085.82 = 172,039.87 : x
  2. Step 2: Convert to fraction form
    315,271.97/435,085.82 = 172,039.87/x
  3. Step 3: Cross multiply
    315,271.97x = 435,085.82 × 172,039.87
  4. Step 4: Simplify right side
    315,271.97x = 74,852,107,911.64
  5. Step 5: Solve for x
    x = 74,852,107,911.64/315,271.97
  6. Step 6: Final answer
    x = 237,420.75

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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.