Home / 85,080.60-117,324.18-56,390.28

Finding the Fourth Proportional to 85,080.60, 117,324.18 and 56,390.28

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Solution

The fourth proportional to 85,080.60, 117,324.18 and 56,390.28 is: 77,760.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,080.60 : 117,324.18 = 56,390.28 : x
  2. Step 2: Convert to fraction form
    85,080.60/117,324.18 = 56,390.28/x
  3. Step 3: Cross multiply
    85,080.60x = 117,324.18 × 56,390.28
  4. Step 4: Simplify right side
    85,080.60x = 6,615,943,360.97
  5. Step 5: Solve for x
    x = 6,615,943,360.97/85,080.60
  6. Step 6: Final answer
    x = 77,760.89

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.