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Finding the Fourth Proportional to 138,374.89, 207,423.64 and 54,019.06

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Solution

The fourth proportional to 138,374.89, 207,423.64 and 54,019.06 is: 80,974.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,374.89 : 207,423.64 = 54,019.06 : x
  2. Step 2: Convert to fraction form
    138,374.89/207,423.64 = 54,019.06/x
  3. Step 3: Cross multiply
    138,374.89x = 207,423.64 × 54,019.06
  4. Step 4: Simplify right side
    138,374.89x = 11,204,830,054.58
  5. Step 5: Solve for x
    x = 11,204,830,054.58/138,374.89
  6. Step 6: Final answer
    x = 80,974.45

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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.