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Finding the Fourth Proportional to 218,959.81, 302,172 and 127,072.02

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Solution

The fourth proportional to 218,959.81, 302,172 and 127,072.02 is: 175,363.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    218,959.81 : 302,172 = 127,072.02 : x
  2. Step 2: Convert to fraction form
    218,959.81/302,172 = 127,072.02/x
  3. Step 3: Cross multiply
    218,959.81x = 302,172 × 127,072.02
  4. Step 4: Simplify right side
    218,959.81x = 38,397,606,427.44
  5. Step 5: Solve for x
    x = 38,397,606,427.44/218,959.81
  6. Step 6: Final answer
    x = 175,363.72

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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.