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Finding the Fourth Proportional to 128,592.42, 177,447.69 and 71,996.10

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Solution

The fourth proportional to 128,592.42, 177,447.69 and 71,996.10 is: 99,349.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,592.42 : 177,447.69 = 71,996.10 : x
  2. Step 2: Convert to fraction form
    128,592.42/177,447.69 = 71,996.10/x
  3. Step 3: Cross multiply
    128,592.42x = 177,447.69 × 71,996.10
  4. Step 4: Simplify right side
    128,592.42x = 12,775,541,634.01
  5. Step 5: Solve for x
    x = 12,775,541,634.01/128,592.42
  6. Step 6: Final answer
    x = 99,349.10

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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.