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Finding the Fourth Proportional to 105,674.74, 145,832.91 and 57,278.21

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Solution

The fourth proportional to 105,674.74, 145,832.91 and 57,278.21 is: 79,044.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    105,674.74 : 145,832.91 = 57,278.21 : x
  2. Step 2: Convert to fraction form
    105,674.74/145,832.91 = 57,278.21/x
  3. Step 3: Cross multiply
    105,674.74x = 145,832.91 × 57,278.21
  4. Step 4: Simplify right side
    105,674.74x = 8,353,047,099.93
  5. Step 5: Solve for x
    x = 8,353,047,099.93/105,674.74
  6. Step 6: Final answer
    x = 79,044.88

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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.