Home / 128,455.39-177,268.73-71,098.68

Finding the Fourth Proportional to 128,455.39, 177,268.73 and 71,098.68

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Solution

The fourth proportional to 128,455.39, 177,268.73 and 71,098.68 is: 98,116.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,455.39 : 177,268.73 = 71,098.68 : x
  2. Step 2: Convert to fraction form
    128,455.39/177,268.73 = 71,098.68/x
  3. Step 3: Cross multiply
    128,455.39x = 177,268.73 × 71,098.68
  4. Step 4: Simplify right side
    128,455.39x = 12,603,572,708.28
  5. Step 5: Solve for x
    x = 12,603,572,708.28/128,455.39
  6. Step 6: Final answer
    x = 98,116.34

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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.