Home / 78,682.17-108,580.02-42,872.48

Finding the Fourth Proportional to 78,682.17, 108,580.02 and 42,872.48

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Solution

The fourth proportional to 78,682.17, 108,580.02 and 42,872.48 is: 59,163.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,682.17 : 108,580.02 = 42,872.48 : x
  2. Step 2: Convert to fraction form
    78,682.17/108,580.02 = 42,872.48/x
  3. Step 3: Cross multiply
    78,682.17x = 108,580.02 × 42,872.48
  4. Step 4: Simplify right side
    78,682.17x = 4,655,094,735.85
  5. Step 5: Solve for x
    x = 4,655,094,735.85/78,682.17
  6. Step 6: Final answer
    x = 59,163.27

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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.