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Finding the Fourth Proportional to 83,650.80, 125,111.70 and 74,829.90

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Solution

The fourth proportional to 83,650.80, 125,111.70 and 74,829.90 is: 111,918.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    83,650.80 : 125,111.70 = 74,829.90 : x
  2. Step 2: Convert to fraction form
    83,650.80/125,111.70 = 74,829.90/x
  3. Step 3: Cross multiply
    83,650.80x = 125,111.70 × 74,829.90
  4. Step 4: Simplify right side
    83,650.80x = 9,362,095,999.83
  5. Step 5: Solve for x
    x = 9,362,095,999.83/83,650.80
  6. Step 6: Final answer
    x = 111,918.79

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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.