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Finding the Fourth Proportional to 245,172.58, 367,731.52 and 85,220.87

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Solution

The fourth proportional to 245,172.58, 367,731.52 and 85,220.87 is: 127,821.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    245,172.58 : 367,731.52 = 85,220.87 : x
  2. Step 2: Convert to fraction form
    245,172.58/367,731.52 = 85,220.87/x
  3. Step 3: Cross multiply
    245,172.58x = 367,731.52 × 85,220.87
  4. Step 4: Simplify right side
    245,172.58x = 31,338,400,060.82
  5. Step 5: Solve for x
    x = 31,338,400,060.82/245,172.58
  6. Step 6: Final answer
    x = 127,821.80

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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.