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Finding the Fourth Proportional to 128,419.29, 177,231.96 and 73,973.34

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Solution

The fourth proportional to 128,419.29, 177,231.96 and 73,973.34 is: 102,090.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,419.29 : 177,231.96 = 73,973.34 : x
  2. Step 2: Convert to fraction form
    128,419.29/177,231.96 = 73,973.34/x
  3. Step 3: Cross multiply
    128,419.29x = 177,231.96 × 73,973.34
  4. Step 4: Simplify right side
    128,419.29x = 13,110,440,035.95
  5. Step 5: Solve for x
    x = 13,110,440,035.95/128,419.29
  6. Step 6: Final answer
    x = 102,090.89

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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.