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Finding the Fourth Proportional to 98,145.63, 135,442.79 and 55,706.89

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Solution

The fourth proportional to 98,145.63, 135,442.79 and 55,706.89 is: 76,876.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    98,145.63 : 135,442.79 = 55,706.89 : x
  2. Step 2: Convert to fraction form
    98,145.63/135,442.79 = 55,706.89/x
  3. Step 3: Cross multiply
    98,145.63x = 135,442.79 × 55,706.89
  4. Step 4: Simplify right side
    98,145.63x = 7,545,096,603.82
  5. Step 5: Solve for x
    x = 7,545,096,603.82/98,145.63
  6. Step 6: Final answer
    x = 76,876.54

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.