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Finding the Fourth Proportional to 128,394.48, 177,189.68 and 71,032.87

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Solution

The fourth proportional to 128,394.48, 177,189.68 and 71,032.87 is: 98,028.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,394.48 : 177,189.68 = 71,032.87 : x
  2. Step 2: Convert to fraction form
    128,394.48/177,189.68 = 71,032.87/x
  3. Step 3: Cross multiply
    128,394.48x = 177,189.68 × 71,032.87
  4. Step 4: Simplify right side
    128,394.48x = 12,586,290,507.60
  5. Step 5: Solve for x
    x = 12,586,290,507.60/128,394.48
  6. Step 6: Final answer
    x = 98,028.28

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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.