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Finding the Fourth Proportional to 219,404.01, 302,809.86 and 128,809.95

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Solution

The fourth proportional to 219,404.01, 302,809.86 and 128,809.95 is: 177,776.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    219,404.01 : 302,809.86 = 128,809.95 : x
  2. Step 2: Convert to fraction form
    219,404.01/302,809.86 = 128,809.95/x
  3. Step 3: Cross multiply
    219,404.01x = 302,809.86 × 128,809.95
  4. Step 4: Simplify right side
    219,404.01x = 39,004,922,926.11
  5. Step 5: Solve for x
    x = 39,004,922,926.11/219,404.01
  6. Step 6: Final answer
    x = 177,776.71

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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.