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Finding the Fourth Proportional to 98,940.31, 136,540.26 and 56,497.93

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Solution

The fourth proportional to 98,940.31, 136,540.26 and 56,497.93 is: 77,968.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    98,940.31 : 136,540.26 = 56,497.93 : x
  2. Step 2: Convert to fraction form
    98,940.31/136,540.26 = 56,497.93/x
  3. Step 3: Cross multiply
    98,940.31x = 136,540.26 × 56,497.93
  4. Step 4: Simplify right side
    98,940.31x = 7,714,241,710.31
  5. Step 5: Solve for x
    x = 7,714,241,710.31/98,940.31
  6. Step 6: Final answer
    x = 77,968.64

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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.