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Finding the Fourth Proportional to 178,978.61, 246,988.26 and 98,405.44

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Solution

The fourth proportional to 178,978.61, 246,988.26 and 98,405.44 is: 135,798.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    178,978.61 : 246,988.26 = 98,405.44 : x
  2. Step 2: Convert to fraction form
    178,978.61/246,988.26 = 98,405.44/x
  3. Step 3: Cross multiply
    178,978.61x = 246,988.26 × 98,405.44
  4. Step 4: Simplify right side
    178,978.61x = 24,304,987,782.66
  5. Step 5: Solve for x
    x = 24,304,987,782.66/178,978.61
  6. Step 6: Final answer
    x = 135,798.28

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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.