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Finding the Fourth Proportional to 128,745.96, 177,652.44 and 71,382.47

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Solution

The fourth proportional to 128,745.96, 177,652.44 and 71,382.47 is: 98,498.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,745.96 : 177,652.44 = 71,382.47 : x
  2. Step 2: Convert to fraction form
    128,745.96/177,652.44 = 71,382.47/x
  3. Step 3: Cross multiply
    128,745.96x = 177,652.44 × 71,382.47
  4. Step 4: Simplify right side
    128,745.96x = 12,681,269,080.46
  5. Step 5: Solve for x
    x = 12,681,269,080.46/128,745.96
  6. Step 6: Final answer
    x = 98,498.39

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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.