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Finding the Fourth Proportional to 128,613.33, 177,329.57 and 94,518

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Solution

The fourth proportional to 128,613.33, 177,329.57 and 94,518 is: 130,319.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,613.33 : 177,329.57 = 94,518 : x
  2. Step 2: Convert to fraction form
    128,613.33/177,329.57 = 94,518/x
  3. Step 3: Cross multiply
    128,613.33x = 177,329.57 × 94,518
  4. Step 4: Simplify right side
    128,613.33x = 16,760,835,824.67
  5. Step 5: Solve for x
    x = 16,760,835,824.67/128,613.33
  6. Step 6: Final answer
    x = 130,319.59

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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.