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Finding the Fourth Proportional to 105,392.61, 145,440 and 57,644.96

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Solution

The fourth proportional to 105,392.61, 145,440 and 57,644.96 is: 79,549.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    105,392.61 : 145,440 = 57,644.96 : x
  2. Step 2: Convert to fraction form
    105,392.61/145,440 = 57,644.96/x
  3. Step 3: Cross multiply
    105,392.61x = 145,440 × 57,644.96
  4. Step 4: Simplify right side
    105,392.61x = 8,383,882,255.20
  5. Step 5: Solve for x
    x = 8,383,882,255.20/105,392.61
  6. Step 6: Final answer
    x = 79,549.05

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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.