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Finding the Fourth Proportional to 81,729.94, 112,775.11 and 45,913.14

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Solution

The fourth proportional to 81,729.94, 112,775.11 and 45,913.14 is: 63,353.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,729.94 : 112,775.11 = 45,913.14 : x
  2. Step 2: Convert to fraction form
    81,729.94/112,775.11 = 45,913.14/x
  3. Step 3: Cross multiply
    81,729.94x = 112,775.11 × 45,913.14
  4. Step 4: Simplify right side
    81,729.94x = 5,177,859,413.95
  5. Step 5: Solve for x
    x = 5,177,859,413.95/81,729.94
  6. Step 6: Final answer
    x = 63,353.28

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1.5x scale

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.