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Finding the Fourth Proportional to 125,931.92, 173,729.88 and 85,082.94

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Solution

The fourth proportional to 125,931.92, 173,729.88 and 85,082.94 is: 117,376.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    125,931.92 : 173,729.88 = 85,082.94 : x
  2. Step 2: Convert to fraction form
    125,931.92/173,729.88 = 85,082.94/x
  3. Step 3: Cross multiply
    125,931.92x = 173,729.88 × 85,082.94
  4. Step 4: Simplify right side
    125,931.92x = 14,781,448,956.25
  5. Step 5: Solve for x
    x = 14,781,448,956.25/125,931.92
  6. Step 6: Final answer
    x = 117,376.51

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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.