Home / 128,765.36-177,681.96-71,403.24

Finding the Fourth Proportional to 128,765.36, 177,681.96 and 71,403.24

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Solution

The fourth proportional to 128,765.36, 177,681.96 and 71,403.24 is: 98,528.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,765.36 : 177,681.96 = 71,403.24 : x
  2. Step 2: Convert to fraction form
    128,765.36/177,681.96 = 71,403.24/x
  3. Step 3: Cross multiply
    128,765.36x = 177,681.96 × 71,403.24
  4. Step 4: Simplify right side
    128,765.36x = 12,687,067,633.55
  5. Step 5: Solve for x
    x = 12,687,067,633.55/128,765.36
  6. Step 6: Final answer
    x = 98,528.58

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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.