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Finding the Fourth Proportional to 68,702.65, 103,053.16 and 38,719.15

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Solution

The fourth proportional to 68,702.65, 103,053.16 and 38,719.15 is: 58,078.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    68,702.65 : 103,053.16 = 38,719.15 : x
  2. Step 2: Convert to fraction form
    68,702.65/103,053.16 = 38,719.15/x
  3. Step 3: Cross multiply
    68,702.65x = 103,053.16 × 38,719.15
  4. Step 4: Simplify right side
    68,702.65x = 3,990,130,760.01
  5. Step 5: Solve for x
    x = 3,990,130,760.01/68,702.65
  6. Step 6: Final answer
    x = 58,078.27

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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.