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Finding the Fourth Proportional to 91,187.78, 136,789.50 and 32,018.36

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Solution

The fourth proportional to 91,187.78, 136,789.50 and 32,018.36 is: 48,030.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    91,187.78 : 136,789.50 = 32,018.36 : x
  2. Step 2: Convert to fraction form
    91,187.78/136,789.50 = 32,018.36/x
  3. Step 3: Cross multiply
    91,187.78x = 136,789.50 × 32,018.36
  4. Step 4: Simplify right side
    91,187.78x = 4,379,775,455.22
  5. Step 5: Solve for x
    x = 4,379,775,455.22/91,187.78
  6. Step 6: Final answer
    x = 48,030.29

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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.