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Finding the Fourth Proportional to 68,678.64, 94,760.28 and 38,870.64

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Solution

The fourth proportional to 68,678.64, 94,760.28 and 38,870.64 is: 53,632.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    68,678.64 : 94,760.28 = 38,870.64 : x
  2. Step 2: Convert to fraction form
    68,678.64/94,760.28 = 38,870.64/x
  3. Step 3: Cross multiply
    68,678.64x = 94,760.28 × 38,870.64
  4. Step 4: Simplify right side
    68,678.64x = 3,683,392,730.18
  5. Step 5: Solve for x
    x = 3,683,392,730.18/68,678.64
  6. Step 6: Final answer
    x = 53,632.29

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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.