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Finding the Fourth Proportional to 148,881.52, 205,458.12 and 81,813.52

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Solution

The fourth proportional to 148,881.52, 205,458.12 and 81,813.52 is: 112,903.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    148,881.52 : 205,458.12 = 81,813.52 : x
  2. Step 2: Convert to fraction form
    148,881.52/205,458.12 = 81,813.52/x
  3. Step 3: Cross multiply
    148,881.52x = 205,458.12 × 81,813.52
  4. Step 4: Simplify right side
    148,881.52x = 16,809,252,009.78
  5. Step 5: Solve for x
    x = 16,809,252,009.78/148,881.52
  6. Step 6: Final answer
    x = 112,903.55

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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.