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Finding the Fourth Proportional to 139,646.22, 192,711.54 and 75,983.68

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Solution

The fourth proportional to 139,646.22, 192,711.54 and 75,983.68 is: 104,857.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,646.22 : 192,711.54 = 75,983.68 : x
  2. Step 2: Convert to fraction form
    139,646.22/192,711.54 = 75,983.68/x
  3. Step 3: Cross multiply
    139,646.22x = 192,711.54 × 75,983.68
  4. Step 4: Simplify right side
    139,646.22x = 14,642,931,987.67
  5. Step 5: Solve for x
    x = 14,642,931,987.67/139,646.22
  6. Step 6: Final answer
    x = 104,857.35

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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.