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Finding the Fourth Proportional to 115,116.34, 172,539.78 and 43,992.40

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Solution

The fourth proportional to 115,116.34, 172,539.78 and 43,992.40 is: 65,937.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    115,116.34 : 172,539.78 = 43,992.40 : x
  2. Step 2: Convert to fraction form
    115,116.34/172,539.78 = 43,992.40/x
  3. Step 3: Cross multiply
    115,116.34x = 172,539.78 × 43,992.40
  4. Step 4: Simplify right side
    115,116.34x = 7,590,439,017.67
  5. Step 5: Solve for x
    x = 7,590,439,017.67/115,116.34
  6. Step 6: Final answer
    x = 65,937.11

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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.