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Finding the Fourth Proportional to 77,986.80, 116,980.20 and 33,663.60

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Solution

The fourth proportional to 77,986.80, 116,980.20 and 33,663.60 is: 50,495.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    77,986.80 : 116,980.20 = 33,663.60 : x
  2. Step 2: Convert to fraction form
    77,986.80/116,980.20 = 33,663.60/x
  3. Step 3: Cross multiply
    77,986.80x = 116,980.20 × 33,663.60
  4. Step 4: Simplify right side
    77,986.80x = 3,937,974,660.72
  5. Step 5: Solve for x
    x = 3,937,974,660.72/77,986.80
  6. Step 6: Final answer
    x = 50,495.40

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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.