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Finding the Fourth Proportional to 68,086.08, 93,928.08 and 39,779.04

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Solution

The fourth proportional to 68,086.08, 93,928.08 and 39,779.04 is: 54,877.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    68,086.08 : 93,928.08 = 39,779.04 : x
  2. Step 2: Convert to fraction form
    68,086.08/93,928.08 = 39,779.04/x
  3. Step 3: Cross multiply
    68,086.08x = 93,928.08 × 39,779.04
  4. Step 4: Simplify right side
    68,086.08x = 3,736,368,851.44
  5. Step 5: Solve for x
    x = 3,736,368,851.44/68,086.08
  6. Step 6: Final answer
    x = 54,877.13

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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.