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Finding the Fourth Proportional to 66,637.98, 99,955.38 and 21,659.28

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Solution

The fourth proportional to 66,637.98, 99,955.38 and 21,659.28 is: 32,488.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,637.98 : 99,955.38 = 21,659.28 : x
  2. Step 2: Convert to fraction form
    66,637.98/99,955.38 = 21,659.28/x
  3. Step 3: Cross multiply
    66,637.98x = 99,955.38 × 21,659.28
  4. Step 4: Simplify right side
    66,637.98x = 2,164,961,562.93
  5. Step 5: Solve for x
    x = 2,164,961,562.93/66,637.98
  6. Step 6: Final answer
    x = 32,488.40

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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.