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Finding the Fourth Proportional to 84,459.92, 126,669.90 and 28,302.08

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Solution

The fourth proportional to 84,459.92, 126,669.90 and 28,302.08 is: 42,446.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    84,459.92 : 126,669.90 = 28,302.08 : x
  2. Step 2: Convert to fraction form
    84,459.92/126,669.90 = 28,302.08/x
  3. Step 3: Cross multiply
    84,459.92x = 126,669.90 × 28,302.08
  4. Step 4: Simplify right side
    84,459.92x = 3,585,021,643.39
  5. Step 5: Solve for x
    x = 3,585,021,643.39/84,459.92
  6. Step 6: Final answer
    x = 42,446.42

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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.