Home / 78,623.43-117,836.70-61,917.50

Finding the Fourth Proportional to 78,623.43, 117,836.70 and 61,917.50

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Solution

The fourth proportional to 78,623.43, 117,836.70 and 61,917.50 is: 92,798.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,623.43 : 117,836.70 = 61,917.50 : x
  2. Step 2: Convert to fraction form
    78,623.43/117,836.70 = 61,917.50/x
  3. Step 3: Cross multiply
    78,623.43x = 117,836.70 × 61,917.50
  4. Step 4: Simplify right side
    78,623.43x = 7,296,153,872.25
  5. Step 5: Solve for x
    x = 7,296,153,872.25/78,623.43
  6. Step 6: Final answer
    x = 92,798.72

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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.