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Finding the Fourth Proportional to 139,484.14, 192,486.44 and 75,820.56

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Solution

The fourth proportional to 139,484.14, 192,486.44 and 75,820.56 is: 104,631.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,484.14 : 192,486.44 = 75,820.56 : x
  2. Step 2: Convert to fraction form
    139,484.14/192,486.44 = 75,820.56/x
  3. Step 3: Cross multiply
    139,484.14x = 192,486.44 × 75,820.56
  4. Step 4: Simplify right side
    139,484.14x = 14,594,429,673.21
  5. Step 5: Solve for x
    x = 14,594,429,673.21/139,484.14
  6. Step 6: Final answer
    x = 104,631.46

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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.