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Finding the Fourth Proportional to 258,064.32, 386,939.16 and 115,881.96

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Solution

The fourth proportional to 258,064.32, 386,939.16 and 115,881.96 is: 173,752.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    258,064.32 : 386,939.16 = 115,881.96 : x
  2. Step 2: Convert to fraction form
    258,064.32/386,939.16 = 115,881.96/x
  3. Step 3: Cross multiply
    258,064.32x = 386,939.16 × 115,881.96
  4. Step 4: Simplify right side
    258,064.32x = 44,839,268,261.55
  5. Step 5: Solve for x
    x = 44,839,268,261.55/258,064.32
  6. Step 6: Final answer
    x = 173,752.30

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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.