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Finding the Fourth Proportional to 139,442.81, 192,432.56 and 75,780.60

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Solution

The fourth proportional to 139,442.81, 192,432.56 and 75,780.60 is: 104,578.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,442.81 : 192,432.56 = 75,780.60 : x
  2. Step 2: Convert to fraction form
    139,442.81/192,432.56 = 75,780.60/x
  3. Step 3: Cross multiply
    139,442.81x = 192,432.56 × 75,780.60
  4. Step 4: Simplify right side
    139,442.81x = 14,582,654,477.43
  5. Step 5: Solve for x
    x = 14,582,654,477.43/139,442.81
  6. Step 6: Final answer
    x = 104,578.03

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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.