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Finding the Fourth Proportional to 128,503.44, 177,348 and 74,057.52

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Solution

The fourth proportional to 128,503.44, 177,348 and 74,057.52 is: 102,207.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,503.44 : 177,348 = 74,057.52 : x
  2. Step 2: Convert to fraction form
    128,503.44/177,348 = 74,057.52/x
  3. Step 3: Cross multiply
    128,503.44x = 177,348 × 74,057.52
  4. Step 4: Simplify right side
    128,503.44x = 13,133,953,056.96
  5. Step 5: Solve for x
    x = 13,133,953,056.96/128,503.44
  6. Step 6: Final answer
    x = 102,207.02

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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.