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Finding the Fourth Proportional to 78,992.34, 108,994.34 and 45,000.08

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Solution

The fourth proportional to 78,992.34, 108,994.34 and 45,000.08 is: 62,091.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,992.34 : 108,994.34 = 45,000.08 : x
  2. Step 2: Convert to fraction form
    78,992.34/108,994.34 = 45,000.08/x
  3. Step 3: Cross multiply
    78,992.34x = 108,994.34 × 45,000.08
  4. Step 4: Simplify right side
    78,992.34x = 4,904,754,019.55
  5. Step 5: Solve for x
    x = 4,904,754,019.55/78,992.34
  6. Step 6: Final answer
    x = 62,091.52

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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.