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Finding the Fourth Proportional to 139,376.64, 192,341.40 and 75,715.44

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Solution

The fourth proportional to 139,376.64, 192,341.40 and 75,715.44 is: 104,488.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,376.64 : 192,341.40 = 75,715.44 : x
  2. Step 2: Convert to fraction form
    139,376.64/192,341.40 = 75,715.44/x
  3. Step 3: Cross multiply
    139,376.64x = 192,341.40 × 75,715.44
  4. Step 4: Simplify right side
    139,376.64x = 14,563,213,731.22
  5. Step 5: Solve for x
    x = 14,563,213,731.22/139,376.64
  6. Step 6: Final answer
    x = 104,488.20

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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.