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Finding the Fourth Proportional to 139,283.52, 192,212.64 and 75,621.84

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Solution

The fourth proportional to 139,283.52, 192,212.64 and 75,621.84 is: 104,358.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,283.52 : 192,212.64 = 75,621.84 : x
  2. Step 2: Convert to fraction form
    139,283.52/192,212.64 = 75,621.84/x
  3. Step 3: Cross multiply
    139,283.52x = 192,212.64 × 75,621.84
  4. Step 4: Simplify right side
    139,283.52x = 14,535,473,508.06
  5. Step 5: Solve for x
    x = 14,535,473,508.06/139,283.52
  6. Step 6: Final answer
    x = 104,358.89

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1.5x scale

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.