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Finding the Fourth Proportional to 128,090.89, 176,765.25 and 71,502.27

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Solution

The fourth proportional to 128,090.89, 176,765.25 and 71,502.27 is: 98,673.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,090.89 : 176,765.25 = 71,502.27 : x
  2. Step 2: Convert to fraction form
    128,090.89/176,765.25 = 71,502.27/x
  3. Step 3: Cross multiply
    128,090.89x = 176,765.25 × 71,502.27
  4. Step 4: Simplify right side
    128,090.89x = 12,639,116,632.12
  5. Step 5: Solve for x
    x = 12,639,116,632.12/128,090.89
  6. Step 6: Final answer
    x = 98,673.03

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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.