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Finding the Fourth Proportional to 66,471.51, 99,726.71 and 19,725.60

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Solution

The fourth proportional to 66,471.51, 99,726.71 and 19,725.60 is: 29,594.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,471.51 : 99,726.71 = 19,725.60 : x
  2. Step 2: Convert to fraction form
    66,471.51/99,726.71 = 19,725.60/x
  3. Step 3: Cross multiply
    66,471.51x = 99,726.71 × 19,725.60
  4. Step 4: Simplify right side
    66,471.51x = 1,967,169,092.15
  5. Step 5: Solve for x
    x = 1,967,169,092.15/66,471.51
  6. Step 6: Final answer
    x = 29,594.17

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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.