Home / 78,649.24-108,555.78-53,163.40

Finding the Fourth Proportional to 78,649.24, 108,555.78 and 53,163.40

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Solution

The fourth proportional to 78,649.24, 108,555.78 and 53,163.40 is: 73,378.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,649.24 : 108,555.78 = 53,163.40 : x
  2. Step 2: Convert to fraction form
    78,649.24/108,555.78 = 53,163.40/x
  3. Step 3: Cross multiply
    78,649.24x = 108,555.78 × 53,163.40
  4. Step 4: Simplify right side
    78,649.24x = 5,771,194,354.45
  5. Step 5: Solve for x
    x = 5,771,194,354.45/78,649.24
  6. Step 6: Final answer
    x = 73,378.90

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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.