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Finding the Fourth Proportional to 139,060.44, 191,832.75 and 87,987.06

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Solution

The fourth proportional to 139,060.44, 191,832.75 and 87,987.06 is: 121,377.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,060.44 : 191,832.75 = 87,987.06 : x
  2. Step 2: Convert to fraction form
    139,060.44/191,832.75 = 87,987.06/x
  3. Step 3: Cross multiply
    139,060.44x = 191,832.75 × 87,987.06
  4. Step 4: Simplify right side
    139,060.44x = 16,878,799,684.22
  5. Step 5: Solve for x
    x = 16,878,799,684.22/139,060.44
  6. Step 6: Final answer
    x = 121,377.44

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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.