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Finding the Fourth Proportional to 98,243.51, 147,489.80 and 81,804.56

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Solution

The fourth proportional to 98,243.51, 147,489.80 and 81,804.56 is: 122,810.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    98,243.51 : 147,489.80 = 81,804.56 : x
  2. Step 2: Convert to fraction form
    98,243.51/147,489.80 = 81,804.56/x
  3. Step 3: Cross multiply
    98,243.51x = 147,489.80 × 81,804.56
  4. Step 4: Simplify right side
    98,243.51x = 12,065,337,047.02
  5. Step 5: Solve for x
    x = 12,065,337,047.02/98,243.51
  6. Step 6: Final answer
    x = 122,810.53

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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.