Home / 78,507.38-117,800.03-31,121.47

Finding the Fourth Proportional to 78,507.38, 117,800.03 and 31,121.47

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Solution

The fourth proportional to 78,507.38, 117,800.03 and 31,121.47 is: 46,697.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,507.38 : 117,800.03 = 31,121.47 : x
  2. Step 2: Convert to fraction form
    78,507.38/117,800.03 = 31,121.47/x
  3. Step 3: Cross multiply
    78,507.38x = 117,800.03 × 31,121.47
  4. Step 4: Simplify right side
    78,507.38x = 3,666,109,649.54
  5. Step 5: Solve for x
    x = 3,666,109,649.54/78,507.38
  6. Step 6: Final answer
    x = 46,697.64

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.