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Finding the Fourth Proportional to 219,348.48, 302,682.48 and 128,694.90

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Solution

The fourth proportional to 219,348.48, 302,682.48 and 128,694.90 is: 177,588.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    219,348.48 : 302,682.48 = 128,694.90 : x
  2. Step 2: Convert to fraction form
    219,348.48/302,682.48 = 128,694.90/x
  3. Step 3: Cross multiply
    219,348.48x = 302,682.48 × 128,694.90
  4. Step 4: Simplify right side
    219,348.48x = 38,953,691,495.35
  5. Step 5: Solve for x
    x = 38,953,691,495.35/219,348.48
  6. Step 6: Final answer
    x = 177,588.15

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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.