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Finding the Fourth Proportional to 103,573.44, 142,979.44 and 78,090.08

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Solution

The fourth proportional to 103,573.44, 142,979.44 and 78,090.08 is: 107,800.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    103,573.44 : 142,979.44 = 78,090.08 : x
  2. Step 2: Convert to fraction form
    103,573.44/142,979.44 = 78,090.08/x
  3. Step 3: Cross multiply
    103,573.44x = 142,979.44 × 78,090.08
  4. Step 4: Simplify right side
    103,573.44x = 11,165,275,907.96
  5. Step 5: Solve for x
    x = 11,165,275,907.96/103,573.44
  6. Step 6: Final answer
    x = 107,800.57

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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.