Home / 128,330.04-177,092.38-74,633.72

Finding the Fourth Proportional to 128,330.04, 177,092.38 and 74,633.72

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Solution

The fourth proportional to 128,330.04, 177,092.38 and 74,633.72 is: 102,992.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,330.04 : 177,092.38 = 74,633.72 : x
  2. Step 2: Convert to fraction form
    128,330.04/177,092.38 = 74,633.72/x
  3. Step 3: Cross multiply
    128,330.04x = 177,092.38 × 74,633.72
  4. Step 4: Simplify right side
    128,330.04x = 13,217,063,359.20
  5. Step 5: Solve for x
    x = 13,217,063,359.20/128,330.04
  6. Step 6: Final answer
    x = 102,992.75

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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.