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Finding the Fourth Proportional to 323,386.98, 485,043.31 and 86,711.06

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Solution

The fourth proportional to 323,386.98, 485,043.31 and 86,711.06 is: 130,056.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    323,386.98 : 485,043.31 = 86,711.06 : x
  2. Step 2: Convert to fraction form
    323,386.98/485,043.31 = 86,711.06/x
  3. Step 3: Cross multiply
    323,386.98x = 485,043.31 × 86,711.06
  4. Step 4: Simplify right side
    323,386.98x = 42,058,616,914.01
  5. Step 5: Solve for x
    x = 42,058,616,914.01/323,386.98
  6. Step 6: Final answer
    x = 130,056.62

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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.