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Finding the Fourth Proportional to 258,885.06, 388,371.87 and 118,655.70

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Solution

The fourth proportional to 258,885.06, 388,371.87 and 118,655.70 is: 178,003.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    258,885.06 : 388,371.87 = 118,655.70 : x
  2. Step 2: Convert to fraction form
    258,885.06/388,371.87 = 118,655.70/x
  3. Step 3: Cross multiply
    258,885.06x = 388,371.87 × 118,655.70
  4. Step 4: Simplify right side
    258,885.06x = 46,082,536,095.16
  5. Step 5: Solve for x
    x = 46,082,536,095.16/258,885.06
  6. Step 6: Final answer
    x = 178,003.85

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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.