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Finding the Fourth Proportional to 219,499.74, 302,907.24 and 128,839.68

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Solution

The fourth proportional to 219,499.74, 302,907.24 and 128,839.68 is: 177,797.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    219,499.74 : 302,907.24 = 128,839.68 : x
  2. Step 2: Convert to fraction form
    219,499.74/302,907.24 = 128,839.68/x
  3. Step 3: Cross multiply
    219,499.74x = 302,907.24 × 128,839.68
  4. Step 4: Simplify right side
    219,499.74x = 39,026,471,871.28
  5. Step 5: Solve for x
    x = 39,026,471,871.28/219,499.74
  6. Step 6: Final answer
    x = 177,797.35

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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.