Home / 78,110.88-117,142.08-28,184.51

Finding the Fourth Proportional to 78,110.88, 117,142.08 and 28,184.51

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Solution

The fourth proportional to 78,110.88, 117,142.08 and 28,184.51 is: 42,268.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,110.88 : 117,142.08 = 28,184.51 : x
  2. Step 2: Convert to fraction form
    78,110.88/117,142.08 = 28,184.51/x
  3. Step 3: Cross multiply
    78,110.88x = 117,142.08 × 28,184.51
  4. Step 4: Simplify right side
    78,110.88x = 3,301,591,539.47
  5. Step 5: Solve for x
    x = 3,301,591,539.47/78,110.88
  6. Step 6: Final answer
    x = 42,268.01

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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.