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Finding the Fourth Proportional to 79,308.40, 118,978.80 and 26,723.20

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Solution

The fourth proportional to 79,308.40, 118,978.80 and 26,723.20 is: 40,090.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    79,308.40 : 118,978.80 = 26,723.20 : x
  2. Step 2: Convert to fraction form
    79,308.40/118,978.80 = 26,723.20/x
  3. Step 3: Cross multiply
    79,308.40x = 118,978.80 × 26,723.20
  4. Step 4: Simplify right side
    79,308.40x = 3,179,494,268.16
  5. Step 5: Solve for x
    x = 3,179,494,268.16/79,308.40
  6. Step 6: Final answer
    x = 40,090.26

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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.