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Finding the Fourth Proportional to 139,419.24, 192,300.40 and 85,733.68

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Solution

The fourth proportional to 139,419.24, 192,300.40 and 85,733.68 is: 118,252.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,419.24 : 192,300.40 = 85,733.68 : x
  2. Step 2: Convert to fraction form
    139,419.24/192,300.40 = 85,733.68/x
  3. Step 3: Cross multiply
    139,419.24x = 192,300.40 × 85,733.68
  4. Step 4: Simplify right side
    139,419.24x = 16,486,620,957.47
  5. Step 5: Solve for x
    x = 16,486,620,957.47/139,419.24
  6. Step 6: Final answer
    x = 118,252.12

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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.