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Finding the Fourth Proportional to 74,589.78, 102,933.90 and 40,598.40

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Solution

The fourth proportional to 74,589.78, 102,933.90 and 40,598.40 is: 56,025.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    74,589.78 : 102,933.90 = 40,598.40 : x
  2. Step 2: Convert to fraction form
    74,589.78/102,933.90 = 40,598.40/x
  3. Step 3: Cross multiply
    74,589.78x = 102,933.90 × 40,598.40
  4. Step 4: Simplify right side
    74,589.78x = 4,178,951,645.76
  5. Step 5: Solve for x
    x = 4,178,951,645.76/74,589.78
  6. Step 6: Final answer
    x = 56,025.79

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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.