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Finding the Fourth Proportional to 67,387.36, 101,063.64 and 19,991.32

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Solution

The fourth proportional to 67,387.36, 101,063.64 and 19,991.32 is: 29,981.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    67,387.36 : 101,063.64 = 19,991.32 : x
  2. Step 2: Convert to fraction form
    67,387.36/101,063.64 = 19,991.32/x
  3. Step 3: Cross multiply
    67,387.36x = 101,063.64 × 19,991.32
  4. Step 4: Simplify right side
    67,387.36x = 2,020,395,567.60
  5. Step 5: Solve for x
    x = 2,020,395,567.60/67,387.36
  6. Step 6: Final answer
    x = 29,981.82

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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.