Home / 78,003.40-117,005.10-38,566.60

Finding the Fourth Proportional to 78,003.40, 117,005.10 and 38,566.60

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Solution

The fourth proportional to 78,003.40, 117,005.10 and 38,566.60 is: 57,849.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,003.40 : 117,005.10 = 38,566.60 : x
  2. Step 2: Convert to fraction form
    78,003.40/117,005.10 = 38,566.60/x
  3. Step 3: Cross multiply
    78,003.40x = 117,005.10 × 38,566.60
  4. Step 4: Simplify right side
    78,003.40x = 4,512,488,889.66
  5. Step 5: Solve for x
    x = 4,512,488,889.66/78,003.40
  6. Step 6: Final answer
    x = 57,849.90

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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.