Home / 138,768.10-191,503.47-85,082.72

Finding the Fourth Proportional to 138,768.10, 191,503.47 and 85,082.72

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Solution

The fourth proportional to 138,768.10, 191,503.47 and 85,082.72 is: 117,416.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,768.10 : 191,503.47 = 85,082.72 : x
  2. Step 2: Convert to fraction form
    138,768.10/191,503.47 = 85,082.72/x
  3. Step 3: Cross multiply
    138,768.10x = 191,503.47 × 85,082.72
  4. Step 4: Simplify right side
    138,768.10x = 16,293,635,478.58
  5. Step 5: Solve for x
    x = 16,293,635,478.58/138,768.10
  6. Step 6: Final answer
    x = 117,416.29

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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.