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Finding the Fourth Proportional to 66,820.53, 92,212.32 and 39,963.04

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Solution

The fourth proportional to 66,820.53, 92,212.32 and 39,963.04 is: 55,148.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,820.53 : 92,212.32 = 39,963.04 : x
  2. Step 2: Convert to fraction form
    66,820.53/92,212.32 = 39,963.04/x
  3. Step 3: Cross multiply
    66,820.53x = 92,212.32 × 39,963.04
  4. Step 4: Simplify right side
    66,820.53x = 3,685,084,357.47
  5. Step 5: Solve for x
    x = 3,685,084,357.47/66,820.53
  6. Step 6: Final answer
    x = 55,148.99

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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.