Home / 80,954.40-121,431.60-77,455.20

Finding the Fourth Proportional to 80,954.40, 121,431.60 and 77,455.20

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Solution

The fourth proportional to 80,954.40, 121,431.60 and 77,455.20 is: 116,182.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    80,954.40 : 121,431.60 = 77,455.20 : x
  2. Step 2: Convert to fraction form
    80,954.40/121,431.60 = 77,455.20/x
  3. Step 3: Cross multiply
    80,954.40x = 121,431.60 × 77,455.20
  4. Step 4: Simplify right side
    80,954.40x = 9,405,508,864.32
  5. Step 5: Solve for x
    x = 9,405,508,864.32/80,954.40
  6. Step 6: Final answer
    x = 116,182.80

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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.