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Finding the Fourth Proportional to 84,459.79, 126,437.28 and 51,078.88

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Solution

The fourth proportional to 84,459.79, 126,437.28 and 51,078.88 is: 76,465.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    84,459.79 : 126,437.28 = 51,078.88 : x
  2. Step 2: Convert to fraction form
    84,459.79/126,437.28 = 51,078.88/x
  3. Step 3: Cross multiply
    84,459.79x = 126,437.28 × 51,078.88
  4. Step 4: Simplify right side
    84,459.79x = 6,458,274,652.65
  5. Step 5: Solve for x
    x = 6,458,274,652.65/84,459.79
  6. Step 6: Final answer
    x = 76,465.67

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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.