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Finding the Fourth Proportional to 68,961.65, 103,368.96 and 39,315.65

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Solution

The fourth proportional to 68,961.65, 103,368.96 and 39,315.65 is: 58,931.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    68,961.65 : 103,368.96 = 39,315.65 : x
  2. Step 2: Convert to fraction form
    68,961.65/103,368.96 = 39,315.65/x
  3. Step 3: Cross multiply
    68,961.65x = 103,368.96 × 39,315.65
  4. Step 4: Simplify right side
    68,961.65x = 4,064,017,335.38
  5. Step 5: Solve for x
    x = 4,064,017,335.38/68,961.65
  6. Step 6: Final answer
    x = 58,931.56

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.