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Finding the Fourth Proportional to 78,206.80, 117,233.40 and 69,912.40

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Solution

The fourth proportional to 78,206.80, 117,233.40 and 69,912.40 is: 104,799.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,206.80 : 117,233.40 = 69,912.40 : x
  2. Step 2: Convert to fraction form
    78,206.80/117,233.40 = 69,912.40/x
  3. Step 3: Cross multiply
    78,206.80x = 117,233.40 × 69,912.40
  4. Step 4: Simplify right side
    78,206.80x = 8,196,068,354.16
  5. Step 5: Solve for x
    x = 8,196,068,354.16/78,206.80
  6. Step 6: Final answer
    x = 104,799.95

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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.