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Finding the Fourth Proportional to 161,899.56, 243,004.86 and 78,851.88

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Solution

The fourth proportional to 161,899.56, 243,004.86 and 78,851.88 is: 118,353.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    161,899.56 : 243,004.86 = 78,851.88 : x
  2. Step 2: Convert to fraction form
    161,899.56/243,004.86 = 78,851.88/x
  3. Step 3: Cross multiply
    161,899.56x = 243,004.86 × 78,851.88
  4. Step 4: Simplify right side
    161,899.56x = 19,161,390,060.14
  5. Step 5: Solve for x
    x = 19,161,390,060.14/161,899.56
  6. Step 6: Final answer
    x = 118,353.56

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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.