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Finding the Fourth Proportional to 128,467.77, 177,270.72 and 74,027.88

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Solution

The fourth proportional to 128,467.77, 177,270.72 and 74,027.88 is: 102,149.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,467.77 : 177,270.72 = 74,027.88 : x
  2. Step 2: Convert to fraction form
    128,467.77/177,270.72 = 74,027.88/x
  3. Step 3: Cross multiply
    128,467.77x = 177,270.72 × 74,027.88
  4. Step 4: Simplify right side
    128,467.77x = 13,122,975,587.67
  5. Step 5: Solve for x
    x = 13,122,975,587.67/128,467.77
  6. Step 6: Final answer
    x = 102,149.94

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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.