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Finding the Fourth Proportional to 219,283.35, 302,613.54 and 128,640.86

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Solution

The fourth proportional to 219,283.35, 302,613.54 and 128,640.86 is: 177,525.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    219,283.35 : 302,613.54 = 128,640.86 : x
  2. Step 2: Convert to fraction form
    219,283.35/302,613.54 = 128,640.86/x
  3. Step 3: Cross multiply
    219,283.35x = 302,613.54 × 128,640.86
  4. Step 4: Simplify right side
    219,283.35x = 38,928,465,002.58
  5. Step 5: Solve for x
    x = 38,928,465,002.58/219,283.35
  6. Step 6: Final answer
    x = 177,525.86

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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.