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Finding the Fourth Proportional to 68,711.32, 103,073.46 and 21,953.08

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Solution

The fourth proportional to 68,711.32, 103,073.46 and 21,953.08 is: 32,931.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    68,711.32 : 103,073.46 = 21,953.08 : x
  2. Step 2: Convert to fraction form
    68,711.32/103,073.46 = 21,953.08/x
  3. Step 3: Cross multiply
    68,711.32x = 103,073.46 × 21,953.08
  4. Step 4: Simplify right side
    68,711.32x = 2,262,779,913.26
  5. Step 5: Solve for x
    x = 2,262,779,913.26/68,711.32
  6. Step 6: Final answer
    x = 32,931.69

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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.