Home / 78,949.05-108,946.47-43,140.30

Finding the Fourth Proportional to 78,949.05, 108,946.47 and 43,140.30

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Solution

The fourth proportional to 78,949.05, 108,946.47 and 43,140.30 is: 59,531.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,949.05 : 108,946.47 = 43,140.30 : x
  2. Step 2: Convert to fraction form
    78,949.05/108,946.47 = 43,140.30/x
  3. Step 3: Cross multiply
    78,949.05x = 108,946.47 × 43,140.30
  4. Step 4: Simplify right side
    78,949.05x = 4,699,983,399.74
  5. Step 5: Solve for x
    x = 4,699,983,399.74/78,949.05
  6. Step 6: Final answer
    x = 59,531.86

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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.