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Finding the Fourth Proportional to 66,274.83, 99,419.15 and 21,284.82

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Solution

The fourth proportional to 66,274.83, 99,419.15 and 21,284.82 is: 31,929.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,274.83 : 99,419.15 = 21,284.82 : x
  2. Step 2: Convert to fraction form
    66,274.83/99,419.15 = 21,284.82/x
  3. Step 3: Cross multiply
    66,274.83x = 99,419.15 × 21,284.82
  4. Step 4: Simplify right side
    66,274.83x = 2,116,118,605.88
  5. Step 5: Solve for x
    x = 2,116,118,605.88/66,274.83
  6. Step 6: Final answer
    x = 31,929.45

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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.