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Finding the Fourth Proportional to 158,745.32, 219,071.21 and 87,132

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Solution

The fourth proportional to 158,745.32, 219,071.21 and 87,132 is: 120,243.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    158,745.32 : 219,071.21 = 87,132 : x
  2. Step 2: Convert to fraction form
    158,745.32/219,071.21 = 87,132/x
  3. Step 3: Cross multiply
    158,745.32x = 219,071.21 × 87,132
  4. Step 4: Simplify right side
    158,745.32x = 19,088,112,669.72
  5. Step 5: Solve for x
    x = 19,088,112,669.72/158,745.32
  6. Step 6: Final answer
    x = 120,243.62

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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.