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Finding the Fourth Proportional to 84,666.63, 126,911.05 and 28,487.24

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Solution

The fourth proportional to 84,666.63, 126,911.05 and 28,487.24 is: 42,700.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    84,666.63 : 126,911.05 = 28,487.24 : x
  2. Step 2: Convert to fraction form
    84,666.63/126,911.05 = 28,487.24/x
  3. Step 3: Cross multiply
    84,666.63x = 126,911.05 × 28,487.24
  4. Step 4: Simplify right side
    84,666.63x = 3,615,345,274.54
  5. Step 5: Solve for x
    x = 3,615,345,274.54/84,666.63
  6. Step 6: Final answer
    x = 42,700.94

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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.