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Finding the Fourth Proportional to 139,442.55, 192,432.21 and 75,780.35

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Solution

The fourth proportional to 139,442.55, 192,432.21 and 75,780.35 is: 104,577.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,442.55 : 192,432.21 = 75,780.35 : x
  2. Step 2: Convert to fraction form
    139,442.55/192,432.21 = 75,780.35/x
  3. Step 3: Cross multiply
    139,442.55x = 192,432.21 × 75,780.35
  4. Step 4: Simplify right side
    139,442.55x = 14,582,579,262.91
  5. Step 5: Solve for x
    x = 14,582,579,262.91/139,442.55
  6. Step 6: Final answer
    x = 104,577.69

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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.