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Finding the Fourth Proportional to 167,345.60, 251,018.40 and 78,660.32

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Solution

The fourth proportional to 167,345.60, 251,018.40 and 78,660.32 is: 117,990.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    167,345.60 : 251,018.40 = 78,660.32 : x
  2. Step 2: Convert to fraction form
    167,345.60/251,018.40 = 78,660.32/x
  3. Step 3: Cross multiply
    167,345.60x = 251,018.40 × 78,660.32
  4. Step 4: Simplify right side
    167,345.60x = 19,745,187,669.89
  5. Step 5: Solve for x
    x = 19,745,187,669.89/167,345.60
  6. Step 6: Final answer
    x = 117,990.48

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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.