Home / 78,713.60-118,139.52-43,692.80

Finding the Fourth Proportional to 78,713.60, 118,139.52 and 43,692.80

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Solution

The fourth proportional to 78,713.60, 118,139.52 and 43,692.80 is: 65,577.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,713.60 : 118,139.52 = 43,692.80 : x
  2. Step 2: Convert to fraction form
    78,713.60/118,139.52 = 43,692.80/x
  3. Step 3: Cross multiply
    78,713.60x = 118,139.52 × 43,692.80
  4. Step 4: Simplify right side
    78,713.60x = 5,161,846,419.46
  5. Step 5: Solve for x
    x = 5,161,846,419.46/78,713.60
  6. Step 6: Final answer
    x = 65,577.57

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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.