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Finding the Fourth Proportional to 139,359.87, 192,315.75 and 75,697.11

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Solution

The fourth proportional to 139,359.87, 192,315.75 and 75,697.11 is: 104,461.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,359.87 : 192,315.75 = 75,697.11 : x
  2. Step 2: Convert to fraction form
    139,359.87/192,315.75 = 75,697.11/x
  3. Step 3: Cross multiply
    139,359.87x = 192,315.75 × 75,697.11
  4. Step 4: Simplify right side
    139,359.87x = 14,557,746,482.48
  5. Step 5: Solve for x
    x = 14,557,746,482.48/139,359.87
  6. Step 6: Final answer
    x = 104,461.54

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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.