Home / 78,459.17-108,273.78-42,649.07

Finding the Fourth Proportional to 78,459.17, 108,273.78 and 42,649.07

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Solution

The fourth proportional to 78,459.17, 108,273.78 and 42,649.07 is: 58,855.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,459.17 : 108,273.78 = 42,649.07 : x
  2. Step 2: Convert to fraction form
    78,459.17/108,273.78 = 42,649.07/x
  3. Step 3: Cross multiply
    78,459.17x = 108,273.78 × 42,649.07
  4. Step 4: Simplify right side
    78,459.17x = 4,617,775,481.02
  5. Step 5: Solve for x
    x = 4,617,775,481.02/78,459.17
  6. Step 6: Final answer
    x = 58,855.78

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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.