Home / 81,090.56-121,466.34-65,209.70

Finding the Fourth Proportional to 81,090.56, 121,466.34 and 65,209.70

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Solution

The fourth proportional to 81,090.56, 121,466.34 and 65,209.70 is: 97,678.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,090.56 : 121,466.34 = 65,209.70 : x
  2. Step 2: Convert to fraction form
    81,090.56/121,466.34 = 65,209.70/x
  3. Step 3: Cross multiply
    81,090.56x = 121,466.34 × 65,209.70
  4. Step 4: Simplify right side
    81,090.56x = 7,920,783,591.50
  5. Step 5: Solve for x
    x = 7,920,783,591.50/81,090.56
  6. Step 6: Final answer
    x = 97,678.25

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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.