Home / 128,988.08-177,997.56-71,631.04

Finding the Fourth Proportional to 128,988.08, 177,997.56 and 71,631.04

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Solution

The fourth proportional to 128,988.08, 177,997.56 and 71,631.04 is: 98,847.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,988.08 : 177,997.56 = 71,631.04 : x
  2. Step 2: Convert to fraction form
    128,988.08/177,997.56 = 71,631.04/x
  3. Step 3: Cross multiply
    128,988.08x = 177,997.56 × 71,631.04
  4. Step 4: Simplify right side
    128,988.08x = 12,750,149,092.12
  5. Step 5: Solve for x
    x = 12,750,149,092.12/128,988.08
  6. Step 6: Final answer
    x = 98,847.50

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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.