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Finding the Fourth Proportional to 101,656.92, 140,207.44 and 61,328.64

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Solution

The fourth proportional to 101,656.92, 140,207.44 and 61,328.64 is: 84,585.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    101,656.92 : 140,207.44 = 61,328.64 : x
  2. Step 2: Convert to fraction form
    101,656.92/140,207.44 = 61,328.64/x
  3. Step 3: Cross multiply
    101,656.92x = 140,207.44 × 61,328.64
  4. Step 4: Simplify right side
    101,656.92x = 8,598,731,109.24
  5. Step 5: Solve for x
    x = 8,598,731,109.24/101,656.92
  6. Step 6: Final answer
    x = 84,585.79

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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.