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Finding the Fourth Proportional to 68,864.65, 103,283.37 and 18,931.86

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Solution

The fourth proportional to 68,864.65, 103,283.37 and 18,931.86 is: 28,394.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    68,864.65 : 103,283.37 = 18,931.86 : x
  2. Step 2: Convert to fraction form
    68,864.65/103,283.37 = 18,931.86/x
  3. Step 3: Cross multiply
    68,864.65x = 103,283.37 × 18,931.86
  4. Step 4: Simplify right side
    68,864.65x = 1,955,346,301.17
  5. Step 5: Solve for x
    x = 1,955,346,301.17/68,864.65
  6. Step 6: Final answer
    x = 28,394.05

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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.