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Finding the Fourth Proportional to 71,325.80, 98,428.40 and 39,494.01

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Solution

The fourth proportional to 71,325.80, 98,428.40 and 39,494.01 is: 54,501.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    71,325.80 : 98,428.40 = 39,494.01 : x
  2. Step 2: Convert to fraction form
    71,325.80/98,428.40 = 39,494.01/x
  3. Step 3: Cross multiply
    71,325.80x = 98,428.40 × 39,494.01
  4. Step 4: Simplify right side
    71,325.80x = 3,887,332,102.62
  5. Step 5: Solve for x
    x = 3,887,332,102.62/71,325.80
  6. Step 6: Final answer
    x = 54,501.07

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.