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Finding the Fourth Proportional to 66,645.84, 92,040.12 and 57,650.16

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Solution

The fourth proportional to 66,645.84, 92,040.12 and 57,650.16 is: 79,616.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,645.84 : 92,040.12 = 57,650.16 : x
  2. Step 2: Convert to fraction form
    66,645.84/92,040.12 = 57,650.16/x
  3. Step 3: Cross multiply
    66,645.84x = 92,040.12 × 57,650.16
  4. Step 4: Simplify right side
    66,645.84x = 5,306,127,644.42
  5. Step 5: Solve for x
    x = 5,306,127,644.42/66,645.84
  6. Step 6: Final answer
    x = 79,616.79

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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.