Home / 81,424.36-122,691.21-66,957.35

Finding the Fourth Proportional to 81,424.36, 122,691.21 and 66,957.35

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Solution

The fourth proportional to 81,424.36, 122,691.21 and 66,957.35 is: 100,892.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,424.36 : 122,691.21 = 66,957.35 : x
  2. Step 2: Convert to fraction form
    81,424.36/122,691.21 = 66,957.35/x
  3. Step 3: Cross multiply
    81,424.36x = 122,691.21 × 66,957.35
  4. Step 4: Simplify right side
    81,424.36x = 8,215,077,955.11
  5. Step 5: Solve for x
    x = 8,215,077,955.11/81,424.36
  6. Step 6: Final answer
    x = 100,892.15

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.51) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.