Home / 128,009.76-176,661.96-71,422.36

Finding the Fourth Proportional to 128,009.76, 176,661.96 and 71,422.36

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Solution

The fourth proportional to 128,009.76, 176,661.96 and 71,422.36 is: 98,567.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,009.76 : 176,661.96 = 71,422.36 : x
  2. Step 2: Convert to fraction form
    128,009.76/176,661.96 = 71,422.36/x
  3. Step 3: Cross multiply
    128,009.76x = 176,661.96 × 71,422.36
  4. Step 4: Simplify right side
    128,009.76x = 12,617,614,105.43
  5. Step 5: Solve for x
    x = 12,617,614,105.43/128,009.76
  6. Step 6: Final answer
    x = 98,567.59

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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.