Home / 77,455.20-116,182.80-72,789.60

Finding the Fourth Proportional to 77,455.20, 116,182.80 and 72,789.60

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Solution

The fourth proportional to 77,455.20, 116,182.80 and 72,789.60 is: 109,184.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    77,455.20 : 116,182.80 = 72,789.60 : x
  2. Step 2: Convert to fraction form
    77,455.20/116,182.80 = 72,789.60/x
  3. Step 3: Cross multiply
    77,455.20x = 116,182.80 × 72,789.60
  4. Step 4: Simplify right side
    77,455.20x = 8,456,899,538.88
  5. Step 5: Solve for x
    x = 8,456,899,538.88/77,455.20
  6. Step 6: Final answer
    x = 109,184.40

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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.