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Finding the Fourth Proportional to 128,513.30, 177,348.33 and 71,924.68

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Solution

The fourth proportional to 128,513.30, 177,348.33 and 71,924.68 is: 99,256.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,513.30 : 177,348.33 = 71,924.68 : x
  2. Step 2: Convert to fraction form
    128,513.30/177,348.33 = 71,924.68/x
  3. Step 3: Cross multiply
    128,513.30x = 177,348.33 × 71,924.68
  4. Step 4: Simplify right side
    128,513.30x = 12,755,721,883.78
  5. Step 5: Solve for x
    x = 12,755,721,883.78/128,513.30
  6. Step 6: Final answer
    x = 99,256.04

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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.