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Finding the Fourth Proportional to 139,385.64, 192,344.88 and 75,723.24

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Solution

The fourth proportional to 139,385.64, 192,344.88 and 75,723.24 is: 104,494.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,385.64 : 192,344.88 = 75,723.24 : x
  2. Step 2: Convert to fraction form
    139,385.64/192,344.88 = 75,723.24/x
  3. Step 3: Cross multiply
    139,385.64x = 192,344.88 × 75,723.24
  4. Step 4: Simplify right side
    139,385.64x = 14,564,977,511.01
  5. Step 5: Solve for x
    x = 14,564,977,511.01/139,385.64
  6. Step 6: Final answer
    x = 104,494.10

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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.