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Finding the Fourth Proportional to 139,145.61, 192,021.44 and 75,483.87

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Solution

The fourth proportional to 139,145.61, 192,021.44 and 75,483.87 is: 104,168.00

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,145.61 : 192,021.44 = 75,483.87 : x
  2. Step 2: Convert to fraction form
    139,145.61/192,021.44 = 75,483.87/x
  3. Step 3: Cross multiply
    139,145.61x = 192,021.44 × 75,483.87
  4. Step 4: Simplify right side
    139,145.61x = 14,494,520,316.67
  5. Step 5: Solve for x
    x = 14,494,520,316.67/139,145.61
  6. Step 6: Final answer
    x = 104,168.00

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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.