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Finding the Fourth Proportional to 220,988.25, 304,963.79 and 120,386.25

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Solution

The fourth proportional to 220,988.25, 304,963.79 and 120,386.25 is: 166,133.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    220,988.25 : 304,963.79 = 120,386.25 : x
  2. Step 2: Convert to fraction form
    220,988.25/304,963.79 = 120,386.25/x
  3. Step 3: Cross multiply
    220,988.25x = 304,963.79 × 120,386.25
  4. Step 4: Simplify right side
    220,988.25x = 36,713,446,461.96
  5. Step 5: Solve for x
    x = 36,713,446,461.96/220,988.25
  6. Step 6: Final answer
    x = 166,133.03

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1.5x scale

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.