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Finding the Fourth Proportional to 98,760, 136,289.07 and 54,048

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Solution

The fourth proportional to 98,760, 136,289.07 and 54,048 is: 74,586.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    98,760 : 136,289.07 = 54,048 : x
  2. Step 2: Convert to fraction form
    98,760/136,289.07 = 54,048/x
  3. Step 3: Cross multiply
    98,760x = 136,289.07 × 54,048
  4. Step 4: Simplify right side
    98,760x = 7,366,151,655.36
  5. Step 5: Solve for x
    x = 7,366,151,655.36/98,760
  6. Step 6: Final answer
    x = 74,586.39

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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.