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Finding the Fourth Proportional to 323,851.15, 485,721.78 and 87,141.07

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Solution

The fourth proportional to 323,851.15, 485,721.78 and 87,141.07 is: 130,696.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    323,851.15 : 485,721.78 = 87,141.07 : x
  2. Step 2: Convert to fraction form
    323,851.15/485,721.78 = 87,141.07/x
  3. Step 3: Cross multiply
    323,851.15x = 485,721.78 × 87,141.07
  4. Step 4: Simplify right side
    323,851.15x = 42,326,315,631.50
  5. Step 5: Solve for x
    x = 42,326,315,631.50/323,851.15
  6. Step 6: Final answer
    x = 130,696.82

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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.