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Finding the Fourth Proportional to 66,820.49, 92,212.28 and 39,962.99

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Solution

The fourth proportional to 66,820.49, 92,212.28 and 39,962.99 is: 55,148.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,820.49 : 92,212.28 = 39,962.99 : x
  2. Step 2: Convert to fraction form
    66,820.49/92,212.28 = 39,962.99/x
  3. Step 3: Cross multiply
    66,820.49x = 92,212.28 × 39,962.99
  4. Step 4: Simplify right side
    66,820.49x = 3,685,078,604.09
  5. Step 5: Solve for x
    x = 3,685,078,604.09/66,820.49
  6. Step 6: Final answer
    x = 55,148.93

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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.