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Finding the Fourth Proportional to 77,654.40, 116,380.80 and 36,012.80

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Solution

The fourth proportional to 77,654.40, 116,380.80 and 36,012.80 is: 53,972.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    77,654.40 : 116,380.80 = 36,012.80 : x
  2. Step 2: Convert to fraction form
    77,654.40/116,380.80 = 36,012.80/x
  3. Step 3: Cross multiply
    77,654.40x = 116,380.80 × 36,012.80
  4. Step 4: Simplify right side
    77,654.40x = 4,191,198,474.24
  5. Step 5: Solve for x
    x = 4,191,198,474.24/77,654.40
  6. Step 6: Final answer
    x = 53,972.45

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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.