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Finding the Fourth Proportional to 128,262.16, 177,001.50 and 71,673.54

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Solution

The fourth proportional to 128,262.16, 177,001.50 and 71,673.54 is: 98,909.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,262.16 : 177,001.50 = 71,673.54 : x
  2. Step 2: Convert to fraction form
    128,262.16/177,001.50 = 71,673.54/x
  3. Step 3: Cross multiply
    128,262.16x = 177,001.50 × 71,673.54
  4. Step 4: Simplify right side
    128,262.16x = 12,686,324,090.31
  5. Step 5: Solve for x
    x = 12,686,324,090.31/128,262.16
  6. Step 6: Final answer
    x = 98,909.33

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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.