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Finding the Fourth Proportional to 67,549.80, 101,315.10 and 20,807.40

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Solution

The fourth proportional to 67,549.80, 101,315.10 and 20,807.40 is: 31,208.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    67,549.80 : 101,315.10 = 20,807.40 : x
  2. Step 2: Convert to fraction form
    67,549.80/101,315.10 = 20,807.40/x
  3. Step 3: Cross multiply
    67,549.80x = 101,315.10 × 20,807.40
  4. Step 4: Simplify right side
    67,549.80x = 2,108,103,811.74
  5. Step 5: Solve for x
    x = 2,108,103,811.74/67,549.80
  6. Step 6: Final answer
    x = 31,208.14

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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.