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Finding the Fourth Proportional to 219,372.97, 302,736.72 and 128,730.46

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Solution

The fourth proportional to 219,372.97, 302,736.72 and 128,730.46 is: 177,649.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    219,372.97 : 302,736.72 = 128,730.46 : x
  2. Step 2: Convert to fraction form
    219,372.97/302,736.72 = 128,730.46/x
  3. Step 3: Cross multiply
    219,372.97x = 302,736.72 × 128,730.46
  4. Step 4: Simplify right side
    219,372.97x = 38,971,437,224.49
  5. Step 5: Solve for x
    x = 38,971,437,224.49/219,372.97
  6. Step 6: Final answer
    x = 177,649.22

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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.