Home / 128,977.48-177,938.06-74,493.64

Finding the Fourth Proportional to 128,977.48, 177,938.06 and 74,493.64

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Solution

The fourth proportional to 128,977.48, 177,938.06 and 74,493.64 is: 102,771.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,977.48 : 177,938.06 = 74,493.64 : x
  2. Step 2: Convert to fraction form
    128,977.48/177,938.06 = 74,493.64/x
  3. Step 3: Cross multiply
    128,977.48x = 177,938.06 × 74,493.64
  4. Step 4: Simplify right side
    128,977.48x = 13,255,253,783.94
  5. Step 5: Solve for x
    x = 13,255,253,783.94/128,977.48
  6. Step 6: Final answer
    x = 102,771.85

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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.