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Finding the Fourth Proportional to 65,919.06, 98,891.31 and 21,533.88

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Solution

The fourth proportional to 65,919.06, 98,891.31 and 21,533.88 is: 32,304.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    65,919.06 : 98,891.31 = 21,533.88 : x
  2. Step 2: Convert to fraction form
    65,919.06/98,891.31 = 21,533.88/x
  3. Step 3: Cross multiply
    65,919.06x = 98,891.31 × 21,533.88
  4. Step 4: Simplify right side
    65,919.06x = 2,129,513,602.58
  5. Step 5: Solve for x
    x = 2,129,513,602.58/65,919.06
  6. Step 6: Final answer
    x = 32,304.98

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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.