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Finding the Fourth Proportional to 98,685.27, 148,042.49 and 28,555.47

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Solution

The fourth proportional to 98,685.27, 148,042.49 and 28,555.47 is: 42,837.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    98,685.27 : 148,042.49 = 28,555.47 : x
  2. Step 2: Convert to fraction form
    98,685.27/148,042.49 = 28,555.47/x
  3. Step 3: Cross multiply
    98,685.27x = 148,042.49 × 28,555.47
  4. Step 4: Simplify right side
    98,685.27x = 4,227,422,739.14
  5. Step 5: Solve for x
    x = 4,227,422,739.14/98,685.27
  6. Step 6: Final answer
    x = 42,837.42

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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.