Home / 78,682.47-117,905.85-34,285.16

Finding the Fourth Proportional to 78,682.47, 117,905.85 and 34,285.16

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Solution

The fourth proportional to 78,682.47, 117,905.85 and 34,285.16 is: 51,376.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,682.47 : 117,905.85 = 34,285.16 : x
  2. Step 2: Convert to fraction form
    78,682.47/117,905.85 = 34,285.16/x
  3. Step 3: Cross multiply
    78,682.47x = 117,905.85 × 34,285.16
  4. Step 4: Simplify right side
    78,682.47x = 4,042,420,342.66
  5. Step 5: Solve for x
    x = 4,042,420,342.66/78,682.47
  6. Step 6: Final answer
    x = 51,376.38

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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.