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Finding the Fourth Proportional to 139,228.68, 192,133.60 and 75,564.84

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Solution

The fourth proportional to 139,228.68, 192,133.60 and 75,564.84 is: 104,278.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,228.68 : 192,133.60 = 75,564.84 : x
  2. Step 2: Convert to fraction form
    139,228.68/192,133.60 = 75,564.84/x
  3. Step 3: Cross multiply
    139,228.68x = 192,133.60 × 75,564.84
  4. Step 4: Simplify right side
    139,228.68x = 14,518,544,742.62
  5. Step 5: Solve for x
    x = 14,518,544,742.62/139,228.68
  6. Step 6: Final answer
    x = 104,278.41

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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.