Home / 221,536.35-305,670.78-130,830.39

Finding the Fourth Proportional to 221,536.35, 305,670.78 and 130,830.39

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Solution

The fourth proportional to 221,536.35, 305,670.78 and 130,830.39 is: 180,516.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    221,536.35 : 305,670.78 = 130,830.39 : x
  2. Step 2: Convert to fraction form
    221,536.35/305,670.78 = 130,830.39/x
  3. Step 3: Cross multiply
    221,536.35x = 305,670.78 × 130,830.39
  4. Step 4: Simplify right side
    221,536.35x = 39,991,027,359.00
  5. Step 5: Solve for x
    x = 39,991,027,359.00/221,536.35
  6. Step 6: Final answer
    x = 180,516.77

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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.