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Finding the Fourth Proportional to 66,612.31, 99,934.16 and 21,633.51

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Solution

The fourth proportional to 66,612.31, 99,934.16 and 21,633.51 is: 32,455.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,612.31 : 99,934.16 = 21,633.51 : x
  2. Step 2: Convert to fraction form
    66,612.31/99,934.16 = 21,633.51/x
  3. Step 3: Cross multiply
    66,612.31x = 99,934.16 × 21,633.51
  4. Step 4: Simplify right side
    66,612.31x = 2,161,926,649.70
  5. Step 5: Solve for x
    x = 2,161,926,649.70/66,612.31
  6. Step 6: Final answer
    x = 32,455.36

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1.5x scale

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.