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Finding the Fourth Proportional to 67,881.18, 101,782.08 and 20,482.05

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Solution

The fourth proportional to 67,881.18, 101,782.08 and 20,482.05 is: 30,711.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    67,881.18 : 101,782.08 = 20,482.05 : x
  2. Step 2: Convert to fraction form
    67,881.18/101,782.08 = 20,482.05/x
  3. Step 3: Cross multiply
    67,881.18x = 101,782.08 × 20,482.05
  4. Step 4: Simplify right side
    67,881.18x = 2,084,705,651.66
  5. Step 5: Solve for x
    x = 2,084,705,651.66/67,881.18
  6. Step 6: Final answer
    x = 30,711.10

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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.