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Finding the Fourth Proportional to 139,628.77, 192,688.54 and 75,967.02

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Solution

The fourth proportional to 139,628.77, 192,688.54 and 75,967.02 is: 104,834.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,628.77 : 192,688.54 = 75,967.02 : x
  2. Step 2: Convert to fraction form
    139,628.77/192,688.54 = 75,967.02/x
  3. Step 3: Cross multiply
    139,628.77x = 192,688.54 × 75,967.02
  4. Step 4: Simplify right side
    139,628.77x = 14,637,973,982.03
  5. Step 5: Solve for x
    x = 14,637,973,982.03/139,628.77
  6. Step 6: Final answer
    x = 104,834.94

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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.