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Finding the Fourth Proportional to 77,736.80, 116,502.80 and 68,930.40

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Solution

The fourth proportional to 77,736.80, 116,502.80 and 68,930.40 is: 103,304.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    77,736.80 : 116,502.80 = 68,930.40 : x
  2. Step 2: Convert to fraction form
    77,736.80/116,502.80 = 68,930.40/x
  3. Step 3: Cross multiply
    77,736.80x = 116,502.80 × 68,930.40
  4. Step 4: Simplify right side
    77,736.80x = 8,030,584,605.12
  5. Step 5: Solve for x
    x = 8,030,584,605.12/77,736.80
  6. Step 6: Final answer
    x = 103,304.80

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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.