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Finding the Fourth Proportional to 139,862.66, 193,024.32 and 85,411.76

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Solution

The fourth proportional to 139,862.66, 193,024.32 and 85,411.76 is: 117,876.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,862.66 : 193,024.32 = 85,411.76 : x
  2. Step 2: Convert to fraction form
    139,862.66/193,024.32 = 85,411.76/x
  3. Step 3: Cross multiply
    139,862.66x = 193,024.32 × 85,411.76
  4. Step 4: Simplify right side
    139,862.66x = 16,486,546,894.00
  5. Step 5: Solve for x
    x = 16,486,546,894.00/139,862.66
  6. Step 6: Final answer
    x = 117,876.69

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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.