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Finding the Fourth Proportional to 100,821.97, 139,133.22 and 55,498.99

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Solution

The fourth proportional to 100,821.97, 139,133.22 and 55,498.99 is: 76,588.00

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,821.97 : 139,133.22 = 55,498.99 : x
  2. Step 2: Convert to fraction form
    100,821.97/139,133.22 = 55,498.99/x
  3. Step 3: Cross multiply
    100,821.97x = 139,133.22 × 55,498.99
  4. Step 4: Simplify right side
    100,821.97x = 7,721,753,185.45
  5. Step 5: Solve for x
    x = 7,721,753,185.45/100,821.97
  6. Step 6: Final answer
    x = 76,588.00

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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.