Home / 128,374.24-177,142.88-71,004.44

Finding the Fourth Proportional to 128,374.24, 177,142.88 and 71,004.44

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Solution

The fourth proportional to 128,374.24, 177,142.88 and 71,004.44 is: 97,978.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,374.24 : 177,142.88 = 71,004.44 : x
  2. Step 2: Convert to fraction form
    128,374.24/177,142.88 = 71,004.44/x
  3. Step 3: Cross multiply
    128,374.24x = 177,142.88 × 71,004.44
  4. Step 4: Simplify right side
    128,374.24x = 12,577,930,994.39
  5. Step 5: Solve for x
    x = 12,577,930,994.39/128,374.24
  6. Step 6: Final answer
    x = 97,978.62

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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.