Home / 78,066.43-117,086.32-28,136.59

Finding the Fourth Proportional to 78,066.43, 117,086.32 and 28,136.59

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Solution

The fourth proportional to 78,066.43, 117,086.32 and 28,136.59 is: 42,200.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,066.43 : 117,086.32 = 28,136.59 : x
  2. Step 2: Convert to fraction form
    78,066.43/117,086.32 = 28,136.59/x
  3. Step 3: Cross multiply
    78,066.43x = 117,086.32 × 28,136.59
  4. Step 4: Simplify right side
    78,066.43x = 3,294,409,780.45
  5. Step 5: Solve for x
    x = 3,294,409,780.45/78,066.43
  6. Step 6: Final answer
    x = 42,200.08

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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.