Home / 78,821.10-108,774.70-43,012.62

Finding the Fourth Proportional to 78,821.10, 108,774.70 and 43,012.62

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Solution

The fourth proportional to 78,821.10, 108,774.70 and 43,012.62 is: 59,358.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,821.10 : 108,774.70 = 43,012.62 : x
  2. Step 2: Convert to fraction form
    78,821.10/108,774.70 = 43,012.62/x
  3. Step 3: Cross multiply
    78,821.10x = 108,774.70 × 43,012.62
  4. Step 4: Simplify right side
    78,821.10x = 4,678,684,729.18
  5. Step 5: Solve for x
    x = 4,678,684,729.18/78,821.10
  6. Step 6: Final answer
    x = 59,358.28

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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.