Home / 78,964.80-108,971.16-43,155.06

Finding the Fourth Proportional to 78,964.80, 108,971.16 and 43,155.06

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Solution

The fourth proportional to 78,964.80, 108,971.16 and 43,155.06 is: 59,553.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,964.80 : 108,971.16 = 43,155.06 : x
  2. Step 2: Convert to fraction form
    78,964.80/108,971.16 = 43,155.06/x
  3. Step 3: Cross multiply
    78,964.80x = 108,971.16 × 43,155.06
  4. Step 4: Simplify right side
    78,964.80x = 4,702,656,948.07
  5. Step 5: Solve for x
    x = 4,702,656,948.07/78,964.80
  6. Step 6: Final answer
    x = 59,553.84

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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.