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Finding the Fourth Proportional to 138,012.66, 205,995.12 and 118,955.70

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Solution

The fourth proportional to 138,012.66, 205,995.12 and 118,955.70 is: 177,551.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,012.66 : 205,995.12 = 118,955.70 : x
  2. Step 2: Convert to fraction form
    138,012.66/205,995.12 = 118,955.70/x
  3. Step 3: Cross multiply
    138,012.66x = 205,995.12 × 118,955.70
  4. Step 4: Simplify right side
    138,012.66x = 24,504,293,696.18
  5. Step 5: Solve for x
    x = 24,504,293,696.18/138,012.66
  6. Step 6: Final answer
    x = 177,551.06

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.