Home / 138,855.10-208,234.05-72,273.10

Finding the Fourth Proportional to 138,855.10, 208,234.05 and 72,273.10

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Solution

The fourth proportional to 138,855.10, 208,234.05 and 72,273.10 is: 108,384.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,855.10 : 208,234.05 = 72,273.10 : x
  2. Step 2: Convert to fraction form
    138,855.10/208,234.05 = 72,273.10/x
  3. Step 3: Cross multiply
    138,855.10x = 208,234.05 × 72,273.10
  4. Step 4: Simplify right side
    138,855.10x = 15,049,720,319.06
  5. Step 5: Solve for x
    x = 15,049,720,319.06/138,855.10
  6. Step 6: Final answer
    x = 108,384.35

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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.