Home / 78,090.26-117,134.38-18,926.46

Finding the Fourth Proportional to 78,090.26, 117,134.38 and 18,926.46

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Solution

The fourth proportional to 78,090.26, 117,134.38 and 18,926.46 is: 28,389.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,090.26 : 117,134.38 = 18,926.46 : x
  2. Step 2: Convert to fraction form
    78,090.26/117,134.38 = 18,926.46/x
  3. Step 3: Cross multiply
    78,090.26x = 117,134.38 × 18,926.46
  4. Step 4: Simplify right side
    78,090.26x = 2,216,939,157.69
  5. Step 5: Solve for x
    x = 2,216,939,157.69/78,090.26
  6. Step 6: Final answer
    x = 28,389.45

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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.