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Finding the Fourth Proportional to 139,644.38, 192,712.70 and 75,985.67

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Solution

The fourth proportional to 139,644.38, 192,712.70 and 75,985.67 is: 104,862.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,644.38 : 192,712.70 = 75,985.67 : x
  2. Step 2: Convert to fraction form
    139,644.38/192,712.70 = 75,985.67/x
  3. Step 3: Cross multiply
    139,644.38x = 192,712.70 × 75,985.67
  4. Step 4: Simplify right side
    139,644.38x = 14,643,403,627.01
  5. Step 5: Solve for x
    x = 14,643,403,627.01/139,644.38
  6. Step 6: Final answer
    x = 104,862.10

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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.