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Finding the Fourth Proportional to 78,365.82, 117,571.50 and 28,445.12

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Solution

The fourth proportional to 78,365.82, 117,571.50 and 28,445.12 is: 42,675.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,365.82 : 117,571.50 = 28,445.12 : x
  2. Step 2: Convert to fraction form
    78,365.82/117,571.50 = 28,445.12/x
  3. Step 3: Cross multiply
    78,365.82x = 117,571.50 × 28,445.12
  4. Step 4: Simplify right side
    78,365.82x = 3,344,335,426.08
  5. Step 5: Solve for x
    x = 3,344,335,426.08/78,365.82
  6. Step 6: Final answer
    x = 42,675.95

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1.5x scale

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.