Home / 78,209.59-117,318.95-30,178.45

Finding the Fourth Proportional to 78,209.59, 117,318.95 and 30,178.45

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Solution

The fourth proportional to 78,209.59, 117,318.95 and 30,178.45 is: 45,269.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,209.59 : 117,318.95 = 30,178.45 : x
  2. Step 2: Convert to fraction form
    78,209.59/117,318.95 = 30,178.45/x
  3. Step 3: Cross multiply
    78,209.59x = 117,318.95 × 30,178.45
  4. Step 4: Simplify right side
    78,209.59x = 3,540,503,329.14
  5. Step 5: Solve for x
    x = 3,540,503,329.14/78,209.59
  6. Step 6: Final answer
    x = 45,269.43

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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.