Home / 92,509.11-138,680.60-76,815

Finding the Fourth Proportional to 92,509.11, 138,680.60 and 76,815

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Solution

The fourth proportional to 92,509.11, 138,680.60 and 76,815 is: 115,153.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    92,509.11 : 138,680.60 = 76,815 : x
  2. Step 2: Convert to fraction form
    92,509.11/138,680.60 = 76,815/x
  3. Step 3: Cross multiply
    92,509.11x = 138,680.60 × 76,815
  4. Step 4: Simplify right side
    92,509.11x = 10,652,749,904.93
  5. Step 5: Solve for x
    x = 10,652,749,904.93/92,509.11
  6. Step 6: Final answer
    x = 115,153.52

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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.