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Finding the Fourth Proportional to 218,055.71, 327,210.45 and 91,686.80

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Solution

The fourth proportional to 218,055.71, 327,210.45 and 91,686.80 is: 137,583.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    218,055.71 : 327,210.45 = 91,686.80 : x
  2. Step 2: Convert to fraction form
    218,055.71/327,210.45 = 91,686.80/x
  3. Step 3: Cross multiply
    218,055.71x = 327,210.45 × 91,686.80
  4. Step 4: Simplify right side
    218,055.71x = 30,000,879,087.06
  5. Step 5: Solve for x
    x = 30,000,879,087.06/218,055.71
  6. Step 6: Final answer
    x = 137,583.55

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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.