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Finding the Fourth Proportional to 139,055.88, 191,882.90 and 85,343.16

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Solution

The fourth proportional to 139,055.88, 191,882.90 and 85,343.16 is: 117,764.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,055.88 : 191,882.90 = 85,343.16 : x
  2. Step 2: Convert to fraction form
    139,055.88/191,882.90 = 85,343.16/x
  3. Step 3: Cross multiply
    139,055.88x = 191,882.90 × 85,343.16
  4. Step 4: Simplify right side
    139,055.88x = 16,375,893,035.96
  5. Step 5: Solve for x
    x = 16,375,893,035.96/139,055.88
  6. Step 6: Final answer
    x = 117,764.84

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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.