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Finding the Fourth Proportional to 281,081.64, 387,830.51 and 172,208.98

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Solution

The fourth proportional to 281,081.64, 387,830.51 and 172,208.98 is: 237,610.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    281,081.64 : 387,830.51 = 172,208.98 : x
  2. Step 2: Convert to fraction form
    281,081.64/387,830.51 = 172,208.98/x
  3. Step 3: Cross multiply
    281,081.64x = 387,830.51 × 172,208.98
  4. Step 4: Simplify right side
    281,081.64x = 66,787,896,539.98
  5. Step 5: Solve for x
    x = 66,787,896,539.98/281,081.64
  6. Step 6: Final answer
    x = 237,610.31

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.