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Finding the Fourth Proportional to 81,172.80, 112,029.48 and 45,365.40

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Solution

The fourth proportional to 81,172.80, 112,029.48 and 45,365.40 is: 62,610.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,172.80 : 112,029.48 = 45,365.40 : x
  2. Step 2: Convert to fraction form
    81,172.80/112,029.48 = 45,365.40/x
  3. Step 3: Cross multiply
    81,172.80x = 112,029.48 × 45,365.40
  4. Step 4: Simplify right side
    81,172.80x = 5,082,262,171.99
  5. Step 5: Solve for x
    x = 5,082,262,171.99/81,172.80
  6. Step 6: Final answer
    x = 62,610.41

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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.