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Finding the Fourth Proportional to 78,992.84, 108,995.03 and 45,000.58

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Solution

The fourth proportional to 78,992.84, 108,995.03 and 45,000.58 is: 62,092.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,992.84 : 108,995.03 = 45,000.58 : x
  2. Step 2: Convert to fraction form
    78,992.84/108,995.03 = 45,000.58/x
  3. Step 3: Cross multiply
    78,992.84x = 108,995.03 × 45,000.58
  4. Step 4: Simplify right side
    78,992.84x = 4,904,839,567.12
  5. Step 5: Solve for x
    x = 4,904,839,567.12/78,992.84
  6. Step 6: Final answer
    x = 62,092.20

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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.