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Finding the Fourth Proportional to 67,671.70, 101,521.95 and 20,929.30

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Solution

The fourth proportional to 67,671.70, 101,521.95 and 20,929.30 is: 31,398.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    67,671.70 : 101,521.95 = 20,929.30 : x
  2. Step 2: Convert to fraction form
    67,671.70/101,521.95 = 20,929.30/x
  3. Step 3: Cross multiply
    67,671.70x = 101,521.95 × 20,929.30
  4. Step 4: Simplify right side
    67,671.70x = 2,124,783,348.14
  5. Step 5: Solve for x
    x = 2,124,783,348.14/67,671.70
  6. Step 6: Final answer
    x = 31,398.40

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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.