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Finding the Fourth Proportional to 67,623.40, 101,444.70 and 20,871.40

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Solution

The fourth proportional to 67,623.40, 101,444.70 and 20,871.40 is: 31,310.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    67,623.40 : 101,444.70 = 20,871.40 : x
  2. Step 2: Convert to fraction form
    67,623.40/101,444.70 = 20,871.40/x
  3. Step 3: Cross multiply
    67,623.40x = 101,444.70 × 20,871.40
  4. Step 4: Simplify right side
    67,623.40x = 2,117,292,911.58
  5. Step 5: Solve for x
    x = 2,117,292,911.58/67,623.40
  6. Step 6: Final answer
    x = 31,310.06

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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.