Home / 78,921.06-108,913.68-43,114.40

Finding the Fourth Proportional to 78,921.06, 108,913.68 and 43,114.40

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Solution

The fourth proportional to 78,921.06, 108,913.68 and 43,114.40 is: 59,499.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,921.06 : 108,913.68 = 43,114.40 : x
  2. Step 2: Convert to fraction form
    78,921.06/108,913.68 = 43,114.40/x
  3. Step 3: Cross multiply
    78,921.06x = 108,913.68 × 43,114.40
  4. Step 4: Simplify right side
    78,921.06x = 4,695,747,964.99
  5. Step 5: Solve for x
    x = 4,695,747,964.99/78,921.06
  6. Step 6: Final answer
    x = 59,499.30

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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.