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Finding the Fourth Proportional to 245,458.20, 368,273.70 and 120,715.80

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Solution

The fourth proportional to 245,458.20, 368,273.70 and 120,715.80 is: 181,116.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    245,458.20 : 368,273.70 = 120,715.80 : x
  2. Step 2: Convert to fraction form
    245,458.20/368,273.70 = 120,715.80/x
  3. Step 3: Cross multiply
    245,458.20x = 368,273.70 × 120,715.80
  4. Step 4: Simplify right side
    245,458.20x = 44,456,454,314.46
  5. Step 5: Solve for x
    x = 44,456,454,314.46/245,458.20
  6. Step 6: Final answer
    x = 181,116.19

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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.