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Finding the Fourth Proportional to 88,356.64, 122,005.73 and 81,945.89

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Solution

The fourth proportional to 88,356.64, 122,005.73 and 81,945.89 is: 113,153.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    88,356.64 : 122,005.73 = 81,945.89 : x
  2. Step 2: Convert to fraction form
    88,356.64/122,005.73 = 81,945.89/x
  3. Step 3: Cross multiply
    88,356.64x = 122,005.73 × 81,945.89
  4. Step 4: Simplify right side
    88,356.64x = 9,997,868,639.83
  5. Step 5: Solve for x
    x = 9,997,868,639.83/88,356.64
  6. Step 6: Final answer
    x = 113,153.57

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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.