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Finding the Fourth Proportional to 107,930, 148,943.40 and 63,218

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Solution

The fourth proportional to 107,930, 148,943.40 and 63,218 is: 87,240.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    107,930 : 148,943.40 = 63,218 : x
  2. Step 2: Convert to fraction form
    107,930/148,943.40 = 63,218/x
  3. Step 3: Cross multiply
    107,930x = 148,943.40 × 63,218
  4. Step 4: Simplify right side
    107,930x = 9,415,903,861.20
  5. Step 5: Solve for x
    x = 9,415,903,861.20/107,930
  6. Step 6: Final answer
    x = 87,240.84

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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.