Home / 128,279.54-177,026.04-71,690.92

Finding the Fourth Proportional to 128,279.54, 177,026.04 and 71,690.92

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Solution

The fourth proportional to 128,279.54, 177,026.04 and 71,690.92 is: 98,933.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,279.54 : 177,026.04 = 71,690.92 : x
  2. Step 2: Convert to fraction form
    128,279.54/177,026.04 = 71,690.92/x
  3. Step 3: Cross multiply
    128,279.54x = 177,026.04 × 71,690.92
  4. Step 4: Simplify right side
    128,279.54x = 12,691,159,228.99
  5. Step 5: Solve for x
    x = 12,691,159,228.99/128,279.54
  6. Step 6: Final answer
    x = 98,933.62

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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.