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Finding the Fourth Proportional to 128,261.72, 177,026.10 and 74,557.64

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Solution

The fourth proportional to 128,261.72, 177,026.10 and 74,557.64 is: 102,904.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,261.72 : 177,026.10 = 74,557.64 : x
  2. Step 2: Convert to fraction form
    128,261.72/177,026.10 = 74,557.64/x
  3. Step 3: Cross multiply
    128,261.72x = 177,026.10 × 74,557.64
  4. Step 4: Simplify right side
    128,261.72x = 13,198,648,234.40
  5. Step 5: Solve for x
    x = 13,198,648,234.40/128,261.72
  6. Step 6: Final answer
    x = 102,904.03

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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.