Home / 78,325.31-108,090.84-42,515.22

Finding the Fourth Proportional to 78,325.31, 108,090.84 and 42,515.22

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Solution

The fourth proportional to 78,325.31, 108,090.84 and 42,515.22 is: 58,672.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,325.31 : 108,090.84 = 42,515.22 : x
  2. Step 2: Convert to fraction form
    78,325.31/108,090.84 = 42,515.22/x
  3. Step 3: Cross multiply
    78,325.31x = 108,090.84 × 42,515.22
  4. Step 4: Simplify right side
    78,325.31x = 4,595,505,842.58
  5. Step 5: Solve for x
    x = 4,595,505,842.58/78,325.31
  6. Step 6: Final answer
    x = 58,672.05

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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.