Home / 128,777.04-177,709.01-71,416.62

Finding the Fourth Proportional to 128,777.04, 177,709.01 and 71,416.62

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Solution

The fourth proportional to 128,777.04, 177,709.01 and 71,416.62 is: 98,553.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,777.04 : 177,709.01 = 71,416.62 : x
  2. Step 2: Convert to fraction form
    128,777.04/177,709.01 = 71,416.62/x
  3. Step 3: Cross multiply
    128,777.04x = 177,709.01 × 71,416.62
  4. Step 4: Simplify right side
    128,777.04x = 12,691,376,480.66
  5. Step 5: Solve for x
    x = 12,691,376,480.66/128,777.04
  6. Step 6: Final answer
    x = 98,553.10

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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.