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Finding the Fourth Proportional to 139,444.44, 192,427.90 and 75,780.87

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Solution

The fourth proportional to 139,444.44, 192,427.90 and 75,780.87 is: 104,574.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,444.44 : 192,427.90 = 75,780.87 : x
  2. Step 2: Convert to fraction form
    139,444.44/192,427.90 = 75,780.87/x
  3. Step 3: Cross multiply
    139,444.44x = 192,427.90 × 75,780.87
  4. Step 4: Simplify right side
    139,444.44x = 14,582,353,189.48
  5. Step 5: Solve for x
    x = 14,582,353,189.48/139,444.44
  6. Step 6: Final answer
    x = 104,574.65

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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.