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Finding the Fourth Proportional to 310,660.60, 465,990.11 and 86,020.28

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Solution

The fourth proportional to 310,660.60, 465,990.11 and 86,020.28 is: 129,030.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    310,660.60 : 465,990.11 = 86,020.28 : x
  2. Step 2: Convert to fraction form
    310,660.60/465,990.11 = 86,020.28/x
  3. Step 3: Cross multiply
    310,660.60x = 465,990.11 × 86,020.28
  4. Step 4: Simplify right side
    310,660.60x = 40,084,599,309.33
  5. Step 5: Solve for x
    x = 40,084,599,309.33/310,660.60
  6. Step 6: Final answer
    x = 129,030.20

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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.