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Finding the Fourth Proportional to 61,872.68, 85,342.02 and 39,506.60

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Solution

The fourth proportional to 61,872.68, 85,342.02 and 39,506.60 is: 54,492.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    61,872.68 : 85,342.02 = 39,506.60 : x
  2. Step 2: Convert to fraction form
    61,872.68/85,342.02 = 39,506.60/x
  3. Step 3: Cross multiply
    61,872.68x = 85,342.02 × 39,506.60
  4. Step 4: Simplify right side
    61,872.68x = 3,371,573,047.33
  5. Step 5: Solve for x
    x = 3,371,573,047.33/61,872.68
  6. Step 6: Final answer
    x = 54,492.11

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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.