Home / 81,073.84-121,528.12-45,939.28

Finding the Fourth Proportional to 81,073.84, 121,528.12 and 45,939.28

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Solution

The fourth proportional to 81,073.84, 121,528.12 and 45,939.28 is: 68,862.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,073.84 : 121,528.12 = 45,939.28 : x
  2. Step 2: Convert to fraction form
    81,073.84/121,528.12 = 45,939.28/x
  3. Step 3: Cross multiply
    81,073.84x = 121,528.12 × 45,939.28
  4. Step 4: Simplify right side
    81,073.84x = 5,582,914,332.55
  5. Step 5: Solve for x
    x = 5,582,914,332.55/81,073.84
  6. Step 6: Final answer
    x = 68,862.09

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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.