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Finding the Fourth Proportional to 71,325.40, 98,427.90 and 39,494.20

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Solution

The fourth proportional to 71,325.40, 98,427.90 and 39,494.20 is: 54,501.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    71,325.40 : 98,427.90 = 39,494.20 : x
  2. Step 2: Convert to fraction form
    71,325.40/98,427.90 = 39,494.20/x
  3. Step 3: Cross multiply
    71,325.40x = 98,427.90 × 39,494.20
  4. Step 4: Simplify right side
    71,325.40x = 3,887,331,168.18
  5. Step 5: Solve for x
    x = 3,887,331,168.18/71,325.40
  6. Step 6: Final answer
    x = 54,501.36

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1.5x scale

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.