Home / 128,023.08-176,540.76-84,987.38

Finding the Fourth Proportional to 128,023.08, 176,540.76 and 84,987.38

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Solution

The fourth proportional to 128,023.08, 176,540.76 and 84,987.38 is: 117,195.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,023.08 : 176,540.76 = 84,987.38 : x
  2. Step 2: Convert to fraction form
    128,023.08/176,540.76 = 84,987.38/x
  3. Step 3: Cross multiply
    128,023.08x = 176,540.76 × 84,987.38
  4. Step 4: Simplify right side
    128,023.08x = 15,003,736,655.61
  5. Step 5: Solve for x
    x = 15,003,736,655.61/128,023.08
  6. Step 6: Final answer
    x = 117,195.56

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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.