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Finding the Fourth Proportional to 84,325.38, 126,477.11 and 39,980.31

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Solution

The fourth proportional to 84,325.38, 126,477.11 and 39,980.31 is: 59,965.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    84,325.38 : 126,477.11 = 39,980.31 : x
  2. Step 2: Convert to fraction form
    84,325.38/126,477.11 = 39,980.31/x
  3. Step 3: Cross multiply
    84,325.38x = 126,477.11 × 39,980.31
  4. Step 4: Simplify right side
    84,325.38x = 5,056,594,182.00
  5. Step 5: Solve for x
    x = 5,056,594,182.00/84,325.38
  6. Step 6: Final answer
    x = 59,965.27

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1.5x scale

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.