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Finding the Fourth Proportional to 138,425.20, 193,926.50 and 138,425.20

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Solution

The fourth proportional to 138,425.20, 193,926.50 and 138,425.20 is: 193,926.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,425.20 : 193,926.50 = 138,425.20 : x
  2. Step 2: Convert to fraction form
    138,425.20/193,926.50 = 138,425.20/x
  3. Step 3: Cross multiply
    138,425.20x = 193,926.50 × 138,425.20
  4. Step 4: Simplify right side
    138,425.20x = 26,844,314,547.80
  5. Step 5: Solve for x
    x = 26,844,314,547.80/138,425.20
  6. Step 6: Final answer
    x = 193,926.50

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Why These Related Problems?

These problems maintain the same ratio (1.40) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.