Home / 138,623.85-207,935.81-54,423.72

Finding the Fourth Proportional to 138,623.85, 207,935.81 and 54,423.72

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Solution

The fourth proportional to 138,623.85, 207,935.81 and 54,423.72 is: 81,635.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,623.85 : 207,935.81 = 54,423.72 : x
  2. Step 2: Convert to fraction form
    138,623.85/207,935.81 = 54,423.72/x
  3. Step 3: Cross multiply
    138,623.85x = 207,935.81 × 54,423.72
  4. Step 4: Simplify right side
    138,623.85x = 11,316,640,029.29
  5. Step 5: Solve for x
    x = 11,316,640,029.29/138,623.85
  6. Step 6: Final answer
    x = 81,635.59

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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.