Home / 81,521.49-112,451.87-51,258.85

Finding the Fourth Proportional to 81,521.49, 112,451.87 and 51,258.85

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Solution

The fourth proportional to 81,521.49, 112,451.87 and 51,258.85 is: 70,707.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,521.49 : 112,451.87 = 51,258.85 : x
  2. Step 2: Convert to fraction form
    81,521.49/112,451.87 = 51,258.85/x
  3. Step 3: Cross multiply
    81,521.49x = 112,451.87 × 51,258.85
  4. Step 4: Simplify right side
    81,521.49x = 5,764,153,536.55
  5. Step 5: Solve for x
    x = 5,764,153,536.55/81,521.49
  6. Step 6: Final answer
    x = 70,707.17

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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.